OBD2 (OBD-II) Codes & Meaning library

P2261 - Turbocharger/Supercharger Bypass Valve - Mechanical

Description:
This error code indicates a mechanical issue with the turbocharger or supercharger bypass valve, which controls pressure.

Symptoms:

• Loss of power
• Check Engine Light on
• Turbocharger/supercharger noise

Possible Causes:

• Faulty bypass valve
• Damaged or restricted vacuum line
• Faulty boost control solenoid

How to Fix:

• Replace the bypass valve
• Repair or replace vacuum lines
• Replace the boost control solenoid if necessary

How to Prevent:

• Regular turbo system inspections
• Ensure proper maintenance of the turbocharger

Cost to Diagnose:
SGD 150 - 300

P0128 - Coolant Thermostat Below Regulating Temperature

Description:
This code indicates that the engine coolant is not reaching the expected temperature in the proper time, usually due to a thermostat issue.

Symptoms:

• Engine takes too long to warm up
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Faulty thermostat
• Low coolant level
• Temperature sensor issue

How to Fix:

• Replace the thermostat
• Check and top up coolant levels
• Repair or replace the temperature sensor

How to Prevent:

• Regular coolant level checks
• Periodic thermostat maintenance

Cost to Diagnose:
SGD 80 - 150

P0297 - Vehicle Over-Speed Condition

Description:
This code is triggered when the vehicle exceeds a speed that is considered safe by the engine control unit (ECU).

Symptoms:

• Check Engine Light on
• Possible speedometer malfunction
• Vehicle may enter limp mode

Possible Causes:

• Faulty vehicle speed sensor
• Speed limiter issue
• Speedometer malfunction

How to Fix:

• Replace the vehicle speed sensor
• Repair or replace the speedometer

How to Prevent:

• Ensure speed sensors are checked during routine maintenance

Cost to Diagnose:
SGD 80 - 150

P0325 - Knock Sensor 1 Circuit Malfunction (Bank 1)

Description:
The knock sensor detects engine knocking or pinging, which can cause damage if not addressed. This code indicates a problem with the knock sensor in Bank 1.

Symptoms:

• Poor engine performance
• Reduced fuel efficiency
• Engine noise (knocking)

Possible Causes:

• Faulty knock sensor
• Damaged wiring
• Engine control module issue

How to Fix:

• Replace the knock sensor
• Repair any damaged wiring
• Reprogram the engine control module if needed

How to Prevent:

• Use high-quality fuel
• Regular engine inspections

Cost to Diagnose:
SGD 100 - 200

P0335 - Crankshaft Position Sensor A Circuit Malfunction

Description:
This error is triggered when the crankshaft position sensor fails to provide accurate data to the engine control module, which can lead to timing issues.

Symptoms:

• Engine stalling
• Difficulty starting
• Check Engine Light on

Possible Causes:

• Faulty crankshaft position sensor
• Damaged wiring or connectors
• Timing chain or belt issues

How to Fix:

• Replace the crankshaft position sensor
• Repair or replace damaged wiring
• Inspect the timing chain or belt

How to Prevent:

• Routine timing belt or chain checks
• Regular sensor maintenance

Cost to Diagnose:
SGD 100 - 200

P0410 - Secondary Air Injection System Malfunction

Description:
This code refers to a problem with the secondary air injection system, which helps reduce emissions by injecting fresh air into the exhaust stream.

Symptoms:

• Increased emissions
• Check Engine Light on
• Rough idling

Possible Causes:

• Faulty air injection pump
• Damaged air injection hoses
• Blocked air injection system

How to Fix:

• Replace the air injection pump
• Repair or replace damaged hoses
• Clean or unblock the air injection system

How to Prevent:

• Regular emissions system checks
• Avoid driving with a faulty air injection system

Cost to Diagnose:
SGD 120 - 200

P0456 - Evaporative Emission Control System Leak Detected (Very Small Leak)

Description:
This error code occurs when a very small leak is detected in the EVAP system, which prevents fuel vapours from escaping into the atmosphere.

Symptoms:

• Check Engine Light on
• Possible fuel smell near the vehicle

Possible Causes:

• Loose or faulty fuel cap
• Small cracks or leaks in EVAP hoses
• Faulty EVAP purge valve

How to Fix:

• Tighten or replace the fuel cap
• Replace damaged hoses
• Replace the EVAP purge valve

How to Prevent:

• Always ensure the fuel cap is tightened after filling up
• Regularly check the EVAP system

Cost to Diagnose:
SGD 80 - 150

P0520 - Engine Oil Pressure Sensor/Switch Circuit Malfunction

Description:
This code indicates a problem with the engine oil pressure sensor, which monitors the oil pressure in the engine.

Symptoms:

• Oil pressure warning light
• Engine stalling or rough idling
• Check Engine Light on

Possible Causes:

• Faulty oil pressure sensor
• Low engine oil levels
• Oil pump failure

How to Fix:

• Replace the oil pressure sensor
• Top up or change the engine oil
• Repair or replace the oil pump

How to Prevent:

• Regular oil level checks
• Routine oil changes

Cost to Diagnose:
SGD 80 - 150

P0606 - PCM Processor Fault

Description:
This code is triggered when the Powertrain Control Module (PCM), which controls the engine and transmission, detects an internal fault.

Symptoms:

• Engine performance issues
• Transmission shifting problems
• Check Engine Light on

Possible Causes:

• Faulty PCM
• Wiring or electrical issue
• Faulty sensors

How to Fix:

• Replace or reprogram the PCM
• Repair any damaged wiring
• Check and replace faulty sensors

How to Prevent:

• Regular checks of the vehicle’s electrical system
• Avoid overloading the vehicle’s electrical components

Cost to Diagnose:
SGD 200 - 400

P0700 - Transmission Control System Malfunction

Description:
This code is generated when there’s a general fault with the transmission control system. It doesn’t specify the exact problem but indicates an issue with the transmission.

Symptoms:

• Poor or erratic shifting
• Transmission stuck in one gear
• Check Engine Light on

Possible Causes:

• Faulty transmission control module
• Low transmission fluid levels
• Wiring or sensor issues

How to Fix:

• Reprogram or replace the transmission control module
• Top up or change transmission fluid
• Repair or replace damaged wiring

How to Prevent:

• Regular transmission maintenance
• Ensure proper transmission fluid levels

Cost to Diagnose:
SGD 150 - 300

P1100 - Mass Airflow Sensor Intermittent/Erratic

Description:
This code indicates that the mass airflow sensor is sending intermittent or erratic signals to the ECU, causing issues with air-fuel mixture.

Symptoms:

• Rough idling
• Reduced fuel efficiency
• Check Engine Light on

Possible Causes:

• Dirty or faulty mass airflow sensor
• Wiring issues
• Air intake leaks

How to Fix:

• Clean or replace the mass airflow sensor
• Repair any damaged wiring
• Fix air intake leaks

How to Prevent:

• Regular air intake and sensor cleaning
• Routine maintenance of the air filtration system

Cost to Diagnose:
SGD 80 - 150

P1235 - Fuel Pump Control Out of Range

Description:
This code is triggered when the fuel pump control module sends a signal that is out of range or unexpected.

Symptoms:

• Poor acceleration
• Difficulty starting the engine
• Check Engine Light on

Possible Causes:

• Faulty fuel pump
• Fuel pump relay issue
• Damaged wiring

How to Fix:

• Replace the fuel pump
• Repair or replace the fuel pump relay
• Check and repair wiring

How to Prevent:

• Routine checks on the fuel system
• Regular fuel pump maintenance

Cost to Diagnose:
SGD 100 - 200

P0135 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

Description:
This code is triggered when the oxygen sensor heater in Bank 1, Sensor 1 fails to reach the required temperature for operation.

Symptoms:

• Increased fuel consumption
• Failed emissions test
• Check Engine Light on

Possible Causes:

• Faulty oxygen sensor
• Blown fuse for the oxygen sensor heater
• Wiring or connector issues

How to Fix:

• Replace the oxygen sensor
• Check and replace the fuse if necessary
• Repair or replace damaged wiring or connectors

How to Prevent:

• Regular inspection of oxygen sensors during service
• Ensure correct fuel-air ratio in the engine

Cost to Diagnose:
SGD 100 - 180

P0200 - Injector Circuit Malfunction

Description:
This code indicates a problem with the fuel injector circuit, which is responsible for delivering fuel to the engine.

Symptoms:

• Poor fuel economy
• Engine misfire
• Rough idling

Possible Causes:

• Faulty fuel injector
• Wiring issues
• Fuel injector driver in the engine control module (ECM) malfunction

How to Fix:

• Replace the faulty fuel injector
• Repair or replace damaged wiring
• Replace the ECM if needed

How to Prevent:

• Routine maintenance of fuel injectors
• Regular cleaning of fuel injectors

Cost to Diagnose:
SGD 120 - 250

P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)

Description:
This code indicates an issue with the knock sensor in Bank 2, which detects knocking or pinging in the engine.

Symptoms:

• Reduced engine performance
• Poor fuel efficiency
• Engine knocking sound

Possible Causes:

• Faulty knock sensor
• Damaged wiring
• Faulty engine control module

How to Fix:

• Replace the knock sensor
• Repair or replace damaged wiring
• Reprogram or replace the ECM if necessary

How to Prevent:

• Use higher-quality fuel to prevent engine knock
• Perform regular engine checks and maintenance

Cost to Diagnose:
SGD 100 - 200

P0411 - Secondary Air Injection System Incorrect Flow Detected

Description:
This code indicates that the secondary air injection system, which helps reduce emissions, is not delivering the correct amount of air into the exhaust system.

Symptoms:

• Increased emissions
• Failed emissions test
• Check Engine Light on

Possible Causes:

• Faulty air injection pump
• Clogged or blocked air injection system
• Damaged wiring or relay

How to Fix:

• Replace or repair the air injection pump
• Clean or unblock the air injection system
• Repair any damaged wiring

How to Prevent:

• Regular cleaning of the air injection system
• Routine emissions system checks

Cost to Diagnose:
SGD 150 - 300

P0441 - Evaporative Emission Control System Incorrect Purge Flow

Description:
This code occurs when the evaporative emission control (EVAP) system detects incorrect purge flow from the fuel tank vapours.

Symptoms:

• Check Engine Light on
• Poor fuel economy
• Fuel smell around the vehicle

Possible Causes:

• Faulty purge valve
• Damaged or cracked EVAP hoses
• Blocked EVAP canister

How to Fix:

• Replace the purge valve
• Repair or replace damaged hoses
• Clean or replace the EVAP canister

How to Prevent:

• Regular EVAP system inspections
• Ensure the fuel cap is always tightened properly

Cost to Diagnose:
SGD 80 - 150

P0601 - Internal Control Module Memory Checksum Error

Description:
This error indicates a fault within the Powertrain Control Module (PCM), which controls engine and transmission functions.

Symptoms:

• Check Engine Light on
• Poor engine performance
• Transmission issues

Possible Causes:

• Faulty PCM
• Electrical issues
• Corrupted PCM memory

How to Fix:

• Replace or reprogram the PCM
• Repair any electrical issues

How to Prevent:

• Keep the vehicle's electrical system in good condition
• Avoid jump-starting the vehicle incorrectly

Cost to Diagnose:
SGD 200 - 400

P0705 - Transmission Range Sensor Circuit Malfunction (PRNDL Input)

Description:
This code is triggered when there’s an issue with the transmission range sensor, which detects the gear position of the vehicle.

Symptoms:

• Vehicle won’t start in park or neutral
• Transmission stuck in one gear
• Difficulty shifting gears

Possible Causes:

• Faulty transmission range sensor
• Damaged wiring or connectors
• Faulty transmission control module

How to Fix:

• Replace the transmission range sensor
• Repair or replace damaged wiring
• Reprogram or replace the transmission control module

How to Prevent:

• Routine transmission maintenance
• Ensure correct gear shifting during regular driving

Cost to Diagnose:
SGD 150 - 300

P0720 - Output Shaft Speed Sensor Circuit Malfunction

Description:
This code indicates an issue with the output shaft speed sensor, which measures the rotational speed of the transmission's output shaft.

Symptoms:

• Poor or erratic shifting
• Speedometer not working
• Check Engine Light on

Possible Causes:

• Faulty output shaft speed sensor
• Wiring or connector issues
• Transmission control module problem

How to Fix:

• Replace the output shaft speed sensor
• Repair any wiring issues
• Reprogram or replace the transmission control module

How to Prevent:

• Regular transmission system checks
• Keep sensors clean and free from debris

Cost to Diagnose:
SGD 120 - 200

P0730 - Incorrect Gear Ratio

Description:
This code is triggered when the transmission is operating in an incorrect gear ratio, which can lead to shifting problems.

Symptoms:

• Erratic shifting
• Poor acceleration
• Transmission stuck in one gear

Possible Causes:

• Low transmission fluid
• Faulty transmission control module
• Worn transmission components

How to Fix:

• Check and top up transmission fluid
• Replace or reprogram the transmission control module
• Repair or replace worn transmission components

How to Prevent:

• Regular transmission fluid changes
• Avoid aggressive driving

Cost to Diagnose:
SGD 150 - 300

P1128 - Long Term Fuel Trim Too Lean (Bank 1)

Description:
This code occurs when the air-fuel mixture is too lean (too much air, not enough fuel) for an extended period in Bank 1 of the engine.

Symptoms:

• Engine misfire
• Poor acceleration
• Rough idling

Possible Causes:

• Faulty mass airflow sensor
• Vacuum leak
• Clogged fuel injectors

How to Fix:

• Replace the mass airflow sensor
• Repair any vacuum leaks
• Clean or replace fuel injectors

How to Prevent:

• Regular air filter and fuel injector cleaning
• Routine maintenance of the intake system

Cost to Diagnose:
SGD 80 - 150

P1451 - EVAP Control System Canister Vent Solenoid Circuit Malfunction

Description:
This code is triggered when there’s an issue with the canister vent solenoid in the EVAP system, which helps control fuel vapours.

Symptoms:

• Check Engine Light on
• Poor fuel economy
• Fuel smell near the vehicle

Possible Causes:

• Faulty canister vent solenoid
• Damaged wiring or connectors
• Clogged EVAP canister

How to Fix:

• Replace the canister vent solenoid
• Repair or replace damaged wiring
• Clean or replace the EVAP canister

How to Prevent:

• Regular EVAP system inspections
• Keep the fuel cap properly tightened

Cost to Diagnose:
SGD 100 - 180

P0175 - System Too Rich (Bank 2)

Description:
This code is triggered when the air-fuel mixture in Bank 2 is too rich, meaning there is too much fuel and not enough air.

Symptoms:

• Poor fuel economy
• Black smoke from the exhaust
• Check Engine Light on

Possible Causes:

• Faulty fuel injectors
• Faulty mass airflow (MAF) sensor
• Fuel pressure regulator malfunction

How to Fix:

• Replace faulty fuel injectors
• Clean or replace the MAF sensor
• Replace the fuel pressure regulator

How to Prevent:

• Regular maintenance of fuel injectors
• Routine air intake system checks

Cost to Diagnose:
SGD 80 - 150

P0221 - Throttle/Pedal Position Sensor/Switch B Circuit Range/Performance Problem

Description:
This code indicates an issue with the throttle or pedal position sensor/switch that controls the throttle opening.

Symptoms:

• Poor throttle response
• Hesitation while accelerating
• Check Engine Light on

Possible Causes:

• Faulty throttle position sensor (TPS)
• Wiring or connector issues
• Throttle body malfunction

How to Fix:

• Replace the throttle position sensor
• Repair or replace any damaged wiring
• Clean or replace the throttle body

How to Prevent:

• Routine throttle body and sensor maintenance
• Regular cleaning of the air intake system

Cost to Diagnose:
SGD 100 - 180

P0304 - Cylinder 4 Misfire Detected

Description:
This code indicates that cylinder 4 is misfiring, which can lead to poor engine performance.

Symptoms:

• Rough idling
• Poor acceleration
• Engine stalling

Possible Causes:

• Faulty spark plug in cylinder 4
• Ignition coil failure
• Fuel injector issues

How to Fix:

• Replace the spark plug or ignition coil
• Clean or replace the fuel injector

How to Prevent:

• Regular maintenance of spark plugs and ignition system
• Routine fuel system checks

Cost to Diagnose:
SGD 80 - 120

P0402 - Exhaust Gas Recirculation (EGR) Flow Excessive

Description:
This code is triggered when the Exhaust Gas Recirculation (EGR) system allows too much exhaust gas into the intake manifold, leading to engine performance issues.

Symptoms:

• Poor acceleration
• Rough idling
• Check Engine Light on

Possible Causes:

• Faulty EGR valve
• Clogged or restricted EGR passages
• Faulty EGR sensor

How to Fix:

• Replace the EGR valve
• Clean the EGR passages
• Replace the EGR sensor if necessary

How to Prevent:

• Regularly clean the EGR system
• Use fuel additives to reduce carbon build-up

Cost to Diagnose:
SGD 100 - 180

P0501 - Vehicle Speed Sensor Range/Performance

Description:
This code is triggered when the vehicle speed sensor does not send the correct signal to the engine control module (ECM), affecting speed detection.

Symptoms:

• Speedometer not working
• Poor shifting in automatic transmission
• ABS light on

Possible Causes:

• Faulty vehicle speed sensor
• Wiring or connector issues
• Faulty ECM

How to Fix:

• Replace the vehicle speed sensor
• Repair or replace damaged wiring
• Replace or reprogram the ECM

How to Prevent:

• Routine checks of the vehicle's sensors
• Ensure correct fluid levels in the transmission system

Cost to Diagnose:
SGD 80 - 150

P0701 - Transmission Control System Range/Performance

Description:
This code indicates a problem with the transmission control system’s performance, affecting the transmission's ability to shift gears.

Symptoms:

• Poor or erratic shifting
• Transmission stuck in one gear
• Check Engine Light on

Possible Causes:

• Faulty transmission control module
• Low transmission fluid levels
• Wiring or sensor issues

How to Fix:

• Reprogram or replace the transmission control module
• Check and top up transmission fluid
• Repair or replace damaged wiring

How to Prevent:

• Regular transmission maintenance
• Ensure transmission fluid is clean and at the correct level

Cost to Diagnose:
SGD 150 - 300

P0741 - Torque Converter Clutch Circuit Performance or Stuck Off

Description:
This code indicates that the torque converter clutch (TCC) is not engaging or functioning properly, affecting transmission performance.

Symptoms:

• Poor acceleration
• Transmission slipping
• Check Engine Light on

Possible Causes:

• Faulty torque converter clutch solenoid
• Low transmission fluid
• Transmission control module issues

How to Fix:

• Replace the torque converter clutch solenoid
• Top up or replace transmission fluid
• Repair or replace the transmission control module

How to Prevent:

• Regular transmission servicing
• Keep transmission fluid clean and at the correct level

Cost to Diagnose:
SGD 150 - 300

P1125 - Throttle Control Motor Relay Circuit Malfunction

Description:
This code refers to an issue with the throttle control motor relay circuit, which controls the electronic throttle control system.

Symptoms:

• Reduced throttle response
• Check Engine Light on
• Poor engine performance

Possible Causes:

• Faulty throttle control motor relay
• Damaged wiring or connectors
• Throttle body issues

How to Fix:

• Replace the throttle control motor relay
• Repair or replace damaged wiring
• Check and clean the throttle body

How to Prevent:

• Regular throttle system maintenance
• Routine inspection of the vehicle’s electrical systems

Cost to Diagnose:
SGD 100 - 180

P1237 - Turbocharger Boost Pressure Sensor Circuit Low Input

Description:
This code is triggered when the turbocharger boost pressure sensor sends a signal that is below the expected range.

Symptoms:

• Poor acceleration
• Loss of power
• Check Engine Light on

Possible Causes:

• Faulty turbocharger boost pressure sensor
• Leaks in the intake system
• Wiring or connector issues

How to Fix:

• Replace the boost pressure sensor
• Repair any leaks in the intake system
• Repair or replace damaged wiring

How to Prevent:

• Routine turbocharger system maintenance
• Ensure correct pressure in the intake system

Cost to Diagnose:
SGD 150 - 250

P1516 - Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

Description:
This code indicates a problem with the throttle actuator control module’s performance, affecting the throttle body’s ability to control airflow into the engine.

Symptoms:

• Poor throttle response
• Engine stalling or surging
• Check Engine Light on

Possible Causes:

• Faulty throttle actuator control module
• Damaged wiring or connectors
• Throttle body failure

How to Fix:

• Replace the throttle actuator control module
• Repair or replace damaged wiring
• Clean or replace the throttle body

How to Prevent:

• Regular throttle system inspections
• Ensure the vehicle’s electrical system is in good condition

Cost to Diagnose:
SGD 150 - 300

P1602 - Engine Control Module (ECM) Power Supply Malfunction

Description:
This code occurs when the ECM loses power or detects an interruption in its power supply, affecting engine performance.

Symptoms:

• Engine stalls or does not start
• Check Engine Light on
• Transmission issues

Possible Causes:

• Faulty ECM
• Damaged wiring or connectors
• Battery or alternator issues

How to Fix:

• Replace or reprogram the ECM
• Repair or replace any damaged wiring
• Check and replace the battery or alternator if needed

How to Prevent:

• Regular battery and alternator checks
• Ensure proper electrical connections in the vehicle

Cost to Diagnose:
SGD 200 - 400

P2101 - Throttle Actuator Control Motor Circuit Range/Performance

Description:
This code is triggered when the throttle actuator control motor does not perform as expected, affecting the throttle’s operation.

Symptoms:

• Poor throttle response
• Engine stalling or surging
• Check Engine Light on

Possible Causes:

• Faulty throttle actuator motor
• Damaged wiring or connectors
• Throttle body issues

How to Fix:

• Replace the throttle actuator motor
• Repair or replace damaged wiring
• Clean or replace the throttle body

How to Prevent:

• Regular maintenance of the throttle system
• Ensure the electrical system is properly maintained

Cost to Diagnose:
SGD 150 - 300

P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)

Description:
This code indicates that the oxygen sensor heater for Bank 1, Sensor 2 is not working properly. The heater helps the sensor reach operating temperature quickly.

Symptoms:

• Increased emissions
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Faulty oxygen sensor
• Blown fuse for the oxygen sensor heater
• Wiring or connector issues

How to Fix:

• Replace the oxygen sensor
• Repair or replace damaged wiring or connectors
• Replace the blown fuse

How to Prevent:

• Regular maintenance of oxygen sensors
• Ensure the vehicle's electrical system is in good condition

Cost to Diagnose:
SGD 100 - 180

P0201 - Injector Circuit Malfunction (Cylinder 1)

Description:
This code is triggered when there’s a malfunction in the fuel injector circuit for cylinder 1, leading to improper fuel delivery.

Symptoms:

• Poor fuel economy
• Engine misfire
• Rough idling

Possible Causes:

• Faulty fuel injector in cylinder 1
• Wiring or connector issues
• Engine control module (ECM) malfunction

How to Fix:

• Replace the fuel injector
• Repair or replace damaged wiring
• Replace the ECM if necessary

How to Prevent:

• Regular fuel injector maintenance
• Routine inspection of the vehicle’s electrical system

Cost to Diagnose:
SGD 120 - 250

P0303 - Cylinder 3 Misfire Detected

Description:
This code indicates that cylinder 3 is misfiring, affecting engine performance and fuel efficiency.

Symptoms:

• Rough idling
• Poor acceleration
• Engine stalling

Possible Causes:

• Faulty spark plug or ignition coil in cylinder 3
• Fuel injector issues
• Vacuum leak

How to Fix:

• Replace the spark plug or ignition coil
• Clean or replace the fuel injector
• Repair any vacuum leaks

How to Prevent:

• Regular maintenance of spark plugs and ignition system
• Routine fuel system checks

Cost to Diagnose:
SGD 80 - 150

P0421 - Warm Up Catalyst Efficiency Below Threshold (Bank 1)

Description:
This code is triggered when the catalytic converter in Bank 1 does not reach the required temperature to efficiently convert harmful emissions.

Symptoms:

• Failed emissions test
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Faulty catalytic converter
• Faulty oxygen sensor
• Exhaust leak

How to Fix:

• Replace the catalytic converter
• Replace the oxygen sensor
• Repair any exhaust leaks

How to Prevent:

• Regular maintenance of the exhaust system
• Use high-quality fuel to prevent premature wear of the catalytic converter

Cost to Diagnose:
SGD 150 - 300

P0446 - Evaporative Emission Control System Vent Control Circuit

Description:
This code occurs when the EVAP system vent control circuit malfunctions, affecting the vehicle's ability to control fuel vapours.

Symptoms:

• Check Engine Light on
• Poor fuel economy
• Fuel smell around the vehicle

Possible Causes:

• Faulty EVAP vent valve
• Damaged wiring or connectors
• Clogged EVAP canister

How to Fix:

• Replace the EVAP vent valve
• Repair or replace damaged wiring
• Clean or replace the EVAP canister

How to Prevent:

• Regular EVAP system checks
• Ensure the fuel cap is properly tightened

Cost to Diagnose:
SGD 80 - 150

P0506 - Idle Control System RPM Lower Than Expected

Description:
This code is triggered when the engine idle speed is lower than expected, indicating an issue with the idle control system.

Symptoms:

• Engine stalling
• Rough idling
• Poor throttle response

Possible Causes:

• Faulty idle air control valve
• Vacuum leak
• Dirty throttle body

How to Fix:

• Replace the idle air control valve
• Repair any vacuum leaks
• Clean the throttle body

How to Prevent:

• Routine throttle body cleaning
• Regular maintenance of vacuum lines

Cost to Diagnose:
SGD 100 - 180

P0562 - System Voltage Low

Description:
This code is triggered when the vehicle’s electrical system detects low voltage, which can affect various systems.

Symptoms:

• Dim lights
• Vehicle stalls
• Check Engine Light on

Possible Causes:

• Weak or dead battery
• Faulty alternator
• Poor battery connections

How to Fix:

• Replace or recharge the battery
• Repair or replace the alternator
• Clean and secure battery connections

How to Prevent:

• Regular battery and alternator checks
• Ensure proper electrical system maintenance

Cost to Diagnose:
SGD 80 - 150

P0622 - Generator Field Terminal Circuit Malfunction

Description:
This code indicates an issue with the generator field control circuit, which can affect the vehicle’s charging system.

Symptoms:

• Battery warning light
• Poor charging
• Check Engine Light on

Possible Causes:

• Faulty alternator
• Wiring or connector issues
• Engine control module problem

How to Fix:

• Replace the alternator
• Repair or replace damaged wiring
• Reprogram or replace the engine control module

How to Prevent:

• Regular alternator and electrical system maintenance
• Ensure proper battery charging

Cost to Diagnose:
SGD 150 - 300

P0715 - Input/Turbine Speed Sensor Circuit Malfunction

Description:
This code occurs when the input or turbine speed sensor, which monitors the transmission's speed, malfunctions.

Symptoms:

• Poor or erratic shifting
• Transmission slipping
• Check Engine Light on

Possible Causes:

• Faulty input/turbine speed sensor
• Wiring or connector issues
• Transmission control module malfunction

How to Fix:

• Replace the input/turbine speed sensor
• Repair any damaged wiring
• Replace or reprogram the transmission control module

How to Prevent:

• Routine transmission and sensor maintenance
• Ensure proper electrical system checks

Cost to Diagnose:
SGD 150 - 250

P0801 - Reverse Inhibit Control Circuit Malfunction

Description:
This code indicates a problem with the reverse inhibit control circuit, which prevents the vehicle from shifting into reverse under certain conditions.

Symptoms:

• Difficulty shifting into reverse
• Check Engine Light on
• Transmission issues

Possible Causes:

• Faulty reverse inhibit solenoid
• Damaged wiring or connectors
• Transmission control module problem

How to Fix:

• Replace the reverse inhibit solenoid
• Repair or replace damaged wiring
• Reprogram or replace the transmission control module

How to Prevent:

• Routine transmission system checks
• Ensure proper gear shifting during regular maintenance

Cost to Diagnose:
SGD 150 - 300

P1100 - Mass Airflow Sensor Intermittent

Description:
This code is triggered when the mass airflow (MAF) sensor provides intermittent signals to the engine control module, affecting the air-fuel mixture.

Symptoms:

• Rough idling
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Dirty or faulty mass airflow sensor
• Wiring or connector issues
• Air intake system leaks

How to Fix:

• Clean or replace the mass airflow sensor
• Repair or replace damaged wiring
• Fix air intake system leaks

How to Prevent:

• Regular cleaning and maintenance of the air intake system
• Routine inspection of MAF sensors

Cost to Diagnose:
SGD 80 - 150

P1233 - Fuel Pump Driver Module Offline

Description:
This code is triggered when the fuel pump driver module goes offline, affecting the fuel delivery to the engine.

Symptoms:

• Vehicle won’t start
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Faulty fuel pump driver module
• Wiring or connector issues
• Faulty fuel pump

How to Fix:

• Replace the fuel pump driver module
• Repair or replace damaged wiring
• Replace the fuel pump if necessary

How to Prevent:

• Regular fuel system maintenance
• Ensure proper fuel pump function

Cost to Diagnose:
SGD 150 - 300

P1512 - Intake Manifold Runner Control Stuck Closed (Bank 1)

Description:
This code indicates that the intake manifold runner control (IMRC) is stuck in the closed position, affecting air flow to the engine.

Symptoms:

• Poor acceleration
• Engine stalling
• Check Engine Light on

Possible Causes:

• Faulty IMRC actuator
• Carbon build-up in the intake manifold
• Wiring or connector issues

How to Fix:

• Replace the IMRC actuator
• Clean the intake manifold
• Repair or replace damaged wiring

How to Prevent:

• Regular intake manifold cleaning
• Use fuel additives to prevent carbon build-up

Cost to Diagnose:
SGD 150 - 230

P0136 - O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)

Description:
This code indicates a malfunction in the oxygen sensor circuit for Bank 1, Sensor 2, which is responsible for monitoring the efficiency of the catalytic converter.

Symptoms:

• Increased emissions
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Faulty oxygen sensor
• Damaged wiring or connectors
• Exhaust leak

How to Fix:

• Replace the oxygen sensor
• Repair or replace damaged wiring
• Fix any exhaust leaks

How to Prevent:

• Regularly check and replace oxygen sensors
• Perform routine exhaust system maintenance

Cost to Diagnose:
SGD 100 - 180

P0222 - Throttle/Pedal Position Sensor/Switch B Circuit Low Input

Description:
This code is triggered when the throttle or pedal position sensor (Switch B) detects a signal that is lower than the expected input range.

Symptoms:

• Poor throttle response
• Engine stalling
• Check Engine Light on

Possible Causes:

• Faulty throttle position sensor (TPS)
• Damaged wiring or connectors
• Throttle body malfunction

How to Fix:

• Replace the throttle position sensor
• Repair or replace damaged wiring
• Clean or replace the throttle body

How to Prevent:

• Regular throttle body cleaning
• Routine sensor checks during vehicle servicing

Cost to Diagnose:
SGD 100 - 180

P0305 - Cylinder 5 Misfire Detected

Description:
This code indicates that cylinder 5 is misfiring, which can cause rough engine performance and decreased fuel efficiency.

Symptoms:

• Rough idling
• Poor acceleration
• Engine stalling

Possible Causes:

• Faulty spark plug or ignition coil in cylinder 5
• Fuel injector problems
• Vacuum leak

How to Fix:

• Replace the spark plug or ignition coil
• Clean or replace the fuel injector
• Repair any vacuum leaks

How to Prevent:

• Regular maintenance of spark plugs and ignition coils
• Routine fuel injector cleaning

Cost to Diagnose:
SGD 80 - 150

P0418 - Secondary Air Injection System Relay "A" Malfunction

Description:
This code is triggered when there’s a problem with the relay controlling the secondary air injection system, which helps reduce emissions by injecting fresh air into the exhaust stream.

Symptoms:

• Check Engine Light on
• Failed emissions test
• Rough idling

Possible Causes:

• Faulty air injection system relay
• Damaged wiring or connectors
• Clogged air injection system

How to Fix:

• Replace the air injection system relay
• Repair or replace damaged wiring
• Clean or repair the air injection system

How to Prevent:

• Regular maintenance of the air injection system
• Ensure electrical components are in good condition

Cost to Diagnose:
SGD 120 - 200

P0457 - Evaporative Emission Control System Leak Detected (Fuel Cap Loose/Off)

Description:
This code is triggered when the EVAP system detects a leak, often caused by a loose or missing fuel cap.

Symptoms:

• Check Engine Light on
• Fuel smell around the vehicle
• Poor fuel economy

Possible Causes:

• Loose or missing fuel cap
• Cracked or damaged EVAP hoses
• Faulty EVAP purge valve

How to Fix:

• Tighten or replace the fuel cap
• Repair or replace damaged EVAP hoses
• Replace the EVAP purge valve

How to Prevent:

• Always ensure the fuel cap is tightly secured after filling
• Regularly inspect the EVAP system for leaks

Cost to Diagnose:
SGD 80 - 150

P0502 - Vehicle Speed Sensor A Circuit Low Input

Description:
This code is triggered when the vehicle speed sensor (VSS) detects a signal that is lower than the expected range.

Symptoms:

• Speedometer not working
• Poor transmission shifting
• ABS light on

Possible Causes:

• Faulty vehicle speed sensor
• Damaged wiring or connectors
• Faulty transmission control module

How to Fix:

• Replace the vehicle speed sensor
• Repair or replace damaged wiring
• Replace the transmission control module

How to Prevent:

• Regular checks of the vehicle’s speed sensors
• Routine transmission maintenance

Cost to Diagnose:
SGD 100 - 180

P0628 - Fuel Pump Control Circuit Low Voltage

Description:
This code is triggered when the fuel pump control circuit detects low voltage, affecting the fuel delivery to the engine.

Symptoms:

• Poor acceleration
• Vehicle won’t start
• Check Engine Light on

Possible Causes:

• Faulty fuel pump
• Wiring or connector issues
• Faulty fuel pump relay

How to Fix:

• Replace the fuel pump
• Repair or replace damaged wiring
• Replace the fuel pump relay

How to Prevent:

• Regular fuel system checks
• Ensure proper battery and electrical connections

Cost to Diagnose:
SGD 150 - 250

P0717 - Input/Turbine Speed Sensor Circuit No Signal

Description:
This code occurs when the input or turbine speed sensor does not send a signal to the engine control module (ECM), affecting transmission performance.

Symptoms:

• Poor or erratic shifting
• Transmission slipping
• Check Engine Light on

Possible Causes:

• Faulty input/turbine speed sensor
• Wiring or connector issues
• Faulty transmission control module

How to Fix:

• Replace the input/turbine speed sensor
• Repair or replace damaged wiring
• Replace or reprogram the transmission control module

How to Prevent:

• Routine transmission system checks
• Regular inspection of transmission sensors

Cost to Diagnose:
SGD 150 - 250

P0805 - Clutch Position Sensor Circuit Malfunction

Description:
This code indicates a problem with the clutch position sensor circuit, which monitors the position of the clutch pedal.

Symptoms:

• Difficulty shifting gears
• Poor clutch response
• Check Engine Light on

Possible Causes:

• Faulty clutch position sensor
• Wiring or connector issues
• Clutch control module problem

How to Fix:

• Replace the clutch position sensor
• Repair or replace damaged wiring
• Replace the clutch control module

How to Prevent:

• Routine clutch system maintenance
• Ensure proper clutch fluid levels

Cost to Diagnose:
SGD 150 - 300

P1101 - Mass Airflow Sensor Out of Self-Test Range

Description:
This code occurs when the mass airflow (MAF) sensor sends a signal that is out of range during the engine’s self-test.

Symptoms:

• Rough idling
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Dirty or faulty mass airflow sensor
• Air intake leaks
• Wiring or connector issues

How to Fix:

• Clean or replace the mass airflow sensor
• Repair any air intake leaks
• Repair or replace damaged wiring

How to Prevent:

• Regularly clean the air intake system and MAF sensor
• Perform routine checks of the vehicle’s sensors

Cost to Diagnose:
SGD 80 - 150

P1239 - Cooling Fan 2 Control Circuit Malfunction

Description:
This code is triggered when the control circuit for the secondary cooling fan malfunctions, potentially leading to overheating.

Symptoms:

• Engine overheating
• Cooling fan not operating
• Check Engine Light on

Possible Causes:

• Faulty cooling fan relay
• Damaged wiring or connectors
• Faulty cooling fan motor

How to Fix:

• Replace the cooling fan relay
• Repair or replace damaged wiring
• Replace the cooling fan motor

How to Prevent:

• Regularly inspect the cooling system
• Ensure cooling fans are working properly

Cost to Diagnose:
SGD 150 - 300

P1515 - Throttle Actuator Control Module Throttle Position Performance

Description:
This code indicates a problem with the throttle actuator control module’s ability to manage throttle position.

Symptoms:

• Poor throttle response
• Engine stalling
• Check Engine Light on

Possible Causes:

• Faulty throttle actuator control module
• Damaged wiring or connectors
• Throttle body issues

How to Fix:

• Replace the throttle actuator control module
• Repair or replace damaged wiring
• Clean or replace the throttle body

How to Prevent:

• Routine throttle system checks
• Regular maintenance of the vehicle’s electrical system

Cost to Diagnose:
SGD 150 - 300

P0151 - O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1)

Description:
This code indicates that the oxygen sensor in Bank 2, Sensor 1 is reporting a low voltage, meaning the sensor is detecting too much oxygen in the exhaust (running lean).

Symptoms:

• Poor fuel economy
• Rough idling
• Check Engine Light on

Possible Causes:

• Faulty oxygen sensor
• Vacuum leak
• Damaged wiring or connectors

How to Fix:

• Replace the oxygen sensor
• Repair or replace damaged wiring
• Check and repair any vacuum leaks

How to Prevent:

• Regular maintenance of oxygen sensors
• Inspect vacuum lines during routine servicing

Cost to Diagnose:
SGD 100 - 180

P0306 - Cylinder 6 Misfire Detected

Description:
This code indicates that cylinder 6 is misfiring, which can lead to rough engine performance and decreased fuel efficiency.

Symptoms:

• Rough idling
• Poor acceleration
• Engine stalling

Possible Causes:

• Faulty spark plug or ignition coil in cylinder 6
• Fuel injector issues
• Vacuum leak

How to Fix:

• Replace the spark plug or ignition coil
• Clean or replace the fuel injector
• Repair any vacuum leaks

How to Prevent:

• Regular maintenance of spark plugs and ignition coils
• Routine fuel injector cleaning

Cost to Diagnose:
SGD 80 - 150

P0449 - Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

Description:
This code is triggered when the vent valve or solenoid in the EVAP system malfunctions, affecting the system’s ability to control fuel vapours.

Symptoms:

• Check Engine Light on
• Fuel smell around the vehicle
• Poor fuel economy

Possible Causes:

• Faulty EVAP vent valve
• Wiring or connector issues
• Clogged EVAP canister

How to Fix:

• Replace the EVAP vent valve
• Repair or replace damaged wiring
• Clean or replace the EVAP canister

How to Prevent:

• Regular EVAP system checks
• Always ensure the fuel cap is properly secured

Cost to Diagnose:
SGD 80 - 150

P0503 - Vehicle Speed Sensor Intermittent/Erratic/High Input

Description:
This code is triggered when the vehicle speed sensor (VSS) sends an intermittent or erratic signal, which can affect speed readings and transmission shifting.

Symptoms:

• Speedometer not working
• Erratic transmission shifting
• ABS light on

Possible Causes:

• Faulty vehicle speed sensor
• Damaged wiring or connectors
• Faulty transmission control module

How to Fix:

• Replace the vehicle speed sensor
• Repair or replace damaged wiring
• Replace the transmission control module

How to Prevent:

• Regular sensor checks during vehicle servicing
• Ensure proper fluid levels in the transmission system

Cost to Diagnose:
SGD 100 - 180

P0627 - Fuel Pump Control Circuit/Open

Description:
This code indicates an open circuit in the fuel pump control circuit, which can prevent the fuel pump from delivering the correct amount of fuel to the engine.

Symptoms:

• Vehicle won’t start
• Poor acceleration
• Check Engine Light on

Possible Causes:

• Faulty fuel pump
• Open or damaged wiring
• Faulty fuel pump relay

How to Fix:

• Replace the fuel pump
• Repair or replace damaged wiring
• Replace the fuel pump relay

How to Prevent:

• Regular fuel system maintenance
• Ensure proper battery and electrical connections

Cost to Diagnose:
SGD 150 - 250

P0731 - Incorrect Gear Ratio (1st Gear)

Description:
This code is triggered when the transmission control module detects an incorrect gear ratio for 1st gear, affecting the transmission’s ability to shift properly.

Symptoms:

• Erratic shifting
• Transmission slipping
• Check Engine Light on

Possible Causes:

• Low transmission fluid
• Faulty transmission control module
• Worn transmission components

How to Fix:

• Check and top up transmission fluid
• Replace or reprogram the transmission control module
• Repair or replace worn transmission components

How to Prevent:

• Regular transmission fluid changes
• Routine transmission maintenance

Cost to Diagnose:
SGD 150 - 300

P1131 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean (Bank 1)

Description:
This code occurs when the oxygen sensor in Bank 1 does not switch properly and reports a lean condition for an extended period.

Symptoms:

• Poor fuel economy
• Rough idling
• Check Engine Light on

Possible Causes:

• Faulty oxygen sensor
• Vacuum leak
• Fuel injector issues

How to Fix:

• Replace the oxygen sensor
• Repair any vacuum leaks
• Clean or replace the fuel injectors

How to Prevent:

• Regular maintenance of oxygen sensors
• Routine fuel system checks

Cost to Diagnose:
SGD 80 - 150

P1247 - Turbocharger Boost Pressure Low

Description:
This code indicates that the turbocharger is not providing sufficient boost pressure, which can affect engine performance.

Symptoms:

• Poor acceleration
• Loss of power
• Check Engine Light on

Possible Causes:

• Faulty turbocharger
• Intake system leaks
• Boost pressure sensor malfunction

How to Fix:

• Repair or replace the turbocharger
• Repair any intake system leaks
• Replace the boost pressure sensor

How to Prevent:

• Regular turbo system maintenance
• Ensure proper intake system checks

Cost to Diagnose:
SGD 150 - 300

P1506 - Idle Air Control (IAC) System Overspeed

Description:
This code is triggered when the idle air control (IAC) system causes the engine to idle at a higher speed than expected.

Symptoms:

• High idle RPM
• Engine surges
• Check Engine Light on

Possible Causes:

• Faulty idle air control valve
• Vacuum leak
• Throttle body issues

How to Fix:

• Replace the idle air control valve
• Repair any vacuum leaks
• Clean or replace the throttle body

How to Prevent:

• Regular throttle body and vacuum system checks
• Routine inspection of idle control systems

Cost to Diagnose:
SGD 100 - 180

P1603 - ECM (Engine Control Module) Backup Circuit Malfunction

Description:
This code occurs when there is a malfunction in the backup circuit of the engine control module, which can affect engine performance and electrical systems.

Symptoms:

• Engine stalling
• Poor acceleration
• Check Engine Light on

Possible Causes:

• Faulty ECM
• Damaged wiring or connectors
• Battery or alternator issues

How to Fix:

• Replace or reprogram the ECM
• Repair or replace damaged wiring
• Check and replace the battery or alternator

How to Prevent:

• Regular battery and alternator checks
• Ensure proper electrical system maintenance

Cost to Diagnose:
SGD 200 - 400

P2106 - Throttle Actuator Control System - Forced Limited Power

Description:
This code indicates that the throttle actuator control system has limited the engine’s power to protect against further damage due to a detected issue.

Symptoms:

• Reduced engine power
• Poor throttle response
• Check Engine Light on

Possible Causes:

• Faulty throttle actuator control module
• Wiring or connector issues
• Throttle body failure

How to Fix:

• Replace the throttle actuator control module
• Repair or replace damaged wiring
• Clean or replace the throttle body

How to Prevent:

• Routine throttle system maintenance
• Regular inspections of the vehicle’s electrical systems

Cost to Diagnose:
SGD 150 - 300

P2402 - Evaporative Emission System Leak Detection Pump Control Circuit High

Description:
This code is triggered when the EVAP system leak detection pump circuit detects a higher-than-expected voltage.

Symptoms:

• Check Engine Light on
• Failed emissions test
• Fuel smell around the vehicle

Possible Causes:

• Faulty EVAP leak detection pump
• Damaged wiring or connectors
• Faulty EVAP system control module

How to Fix:

• Replace the EVAP leak detection pump
• Repair or replace damaged wiring
• Replace the EVAP system control module

How to Prevent:

• Regular EVAP system maintenance
• Ensure proper electrical system functioning

Cost to Diagnose:
SGD 150 - 300

P0172 - System Too Rich (Bank 1)

Description:
This code indicates that the air-fuel mixture in Bank 1 is too rich, meaning there is too much fuel and not enough air in the combustion process.

Symptoms:

• Poor fuel economy
• Black smoke from the exhaust
• Rough idling

Possible Causes:

• Faulty fuel injector
• Dirty mass airflow (MAF) sensor
• Faulty fuel pressure regulator

How to Fix:

• Clean or replace the MAF sensor
• Replace faulty fuel injectors
• Replace the fuel pressure regulator

How to Prevent:

• Regular maintenance of the fuel system
• Clean air intake systems during servicing

Cost to Diagnose:
SGD 80 - 150

P0219 - Engine Overspeed Condition

Description:
This code occurs when the engine RPM exceeds a safe limit, which can result in engine damage.

Symptoms:

• Engine may enter "limp mode"
• Engine runs at excessively high RPM
• Check Engine Light on

Possible Causes:

• Driver error (over-revving)
• Faulty throttle control system
• Transmission malfunction

How to Fix:

• Inspect and repair the throttle control system
• Reprogram the engine control module (ECM)
• Inspect the transmission for issues

How to Prevent:

• Avoid aggressive driving and over-revving
• Regular engine and transmission maintenance

Cost to Diagnose:
SGD 100 - 180

P0307 - Cylinder 7 Misfire Detected

Description:
This code indicates a misfire in cylinder 7, leading to rough engine operation and reduced fuel efficiency.

Symptoms:

• Rough idling
• Poor acceleration
• Check Engine Light on

Possible Causes:

• Faulty spark plug or ignition coil in cylinder 7
• Fuel injector issues
• Vacuum leaks

How to Fix:

• Replace the spark plug or ignition coil
• Clean or replace the fuel injector
• Repair any vacuum leaks

How to Prevent:

• Routine maintenance of spark plugs and ignition coils
• Regular fuel system checks

Cost to Diagnose:
SGD 80 - 150

P0455 - Evaporative Emission Control System Leak Detected (Gross Leak/No Flow)

Description:
This code indicates a large leak in the evaporative emission control (EVAP) system, leading to fuel vapours escaping into the atmosphere.

Symptoms:

• Check Engine Light on
• Fuel smell around the vehicle
• Poor fuel economy

Possible Causes:

• Loose or faulty fuel cap
• Cracked or damaged EVAP hoses
• Faulty EVAP purge valve

How to Fix:

• Tighten or replace the fuel cap
• Replace damaged EVAP hoses
• Replace the EVAP purge valve

How to Prevent:

• Always ensure the fuel cap is tightened after refueling
• Regularly inspect the EVAP system

Cost to Diagnose:
SGD 80 - 150

P0507 - Idle Control System RPM Higher Than Expected

Description:
This code is triggered when the engine’s idle RPM is higher than expected, indicating an issue with the idle control system.

Symptoms:

• High idle RPM
• Engine surging
• Check Engine Light on

Possible Causes:

• Faulty idle air control valve
• Vacuum leaks
• Dirty throttle body

How to Fix:

• Replace the idle air control valve
• Repair any vacuum leaks
• Clean the throttle body

How to Prevent:

• Regular throttle body and vacuum system checks
• Ensure proper air intake system maintenance

Cost to Diagnose:
SGD 100 - 180

P0600 - Serial Communication Link Malfunction

Description:
This code indicates a failure in the communication between various control modules within the vehicle, often affecting overall system performance.

Symptoms:

• Check Engine Light on
• Poor engine or transmission performance
• Difficulty starting the vehicle

Possible Causes:

• Faulty control module
• Wiring or connector issues
• Battery voltage problems

How to Fix:

• Reprogram or replace the faulty control module
• Repair or replace damaged wiring
• Check and replace the battery if necessary

How to Prevent:

• Regular battery and electrical system checks
• Ensure proper communication between control modules

Cost to Diagnose:
SGD 150 - 300

P0702 - Transmission Control System Electrical

Description:
This code is triggered when there is an electrical fault in the transmission control system, potentially affecting gear shifting.

Symptoms:

• Erratic shifting
• Transmission stuck in one gear
• Check Engine Light on

Possible Causes:

• Faulty transmission control module
• Damaged wiring or connectors
• Low transmission fluid

How to Fix:

• Reprogram or replace the transmission control module
• Repair or replace damaged wiring
• Check and top up transmission fluid

How to Prevent:

• Regular transmission fluid changes
• Ensure proper electrical system maintenance

Cost to Diagnose:
SGD 150 - 300

P0725 - Engine Speed Input Circuit Malfunction

Description:
This code indicates that the engine control module (ECM) is not receiving a proper signal from the engine speed input sensor, affecting transmission performance.

Symptoms:

• Poor transmission shifting
• Transmission slipping
• Check Engine Light on

Possible Causes:

• Faulty engine speed sensor
• Wiring or connector issues
• Faulty transmission control module

How to Fix:

• Replace the engine speed sensor
• Repair or replace damaged wiring
• Replace the transmission control module

How to Prevent:

• Routine transmission and engine system checks
• Regular maintenance of sensors

Cost to Diagnose:
SGD 150 - 250

P1132 - Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich (Bank 1)

Description:
This code occurs when the upstream oxygen sensor in Bank 1 reports a consistently rich condition (too much fuel) for an extended period.

Symptoms:

• Poor fuel economy
• Black smoke from exhaust
• Check Engine Light on

Possible Causes:

• Faulty oxygen sensor
• Dirty mass airflow (MAF) sensor
• Fuel injector issues

How to Fix:

• Replace the oxygen sensor
• Clean or replace the MAF sensor
• Clean or replace the fuel injectors

How to Prevent:

• Regular maintenance of oxygen sensors and MAF sensor
• Routine fuel system checks

Cost to Diagnose:
SGD 100 - 180

P1250 - Pressure Regulator Control Solenoid Malfunction

Description:
This code indicates an issue with the pressure regulator control solenoid, which manages the fuel pressure for optimal engine performance.

Symptoms:

• Poor fuel economy
• Rough idling
• Check Engine Light on

Possible Causes:

• Faulty fuel pressure regulator solenoid
• Damaged wiring or connectors
• Low fuel pressure

How to Fix:

• Replace the fuel pressure regulator solenoid
• Repair or replace damaged wiring
• Check and adjust fuel pressure

How to Prevent:

• Regular fuel system maintenance
• Ensure proper fuel pressure checks

Cost to Diagnose:
SGD 150 - 250

P1502 - Idle Speed Control Auxiliary Inputs Malfunction

Description:
This code is triggered when the idle speed control system fails to manage the engine’s idle speed due to an issue with auxiliary inputs.

Symptoms:

• Engine stalls at idle
• Poor throttle response
• Check Engine Light on

Possible Causes:

• Faulty idle speed control system
• Wiring or connector issues
• Throttle body malfunction

How to Fix:

• Replace the idle speed control system components
• Repair or replace damaged wiring
• Clean or replace the throttle body

How to Prevent:

• Routine inspection of the throttle body and idle speed control system
• Regular maintenance of the vehicle’s electrical system

Cost to Diagnose:
SGD 150 - 300

P2004 - Intake Manifold Runner Control Stuck Open (Bank 1)

Description:
This code is triggered when the intake manifold runner control (IMRC) valve is stuck open in Bank 1, affecting engine air intake efficiency.

Symptoms:

• Poor acceleration
• Decreased fuel economy
• Check Engine Light on

Possible Causes:

• Faulty IMRC actuator
• Carbon build-up in the intake manifold
• Wiring or connector issues

How to Fix:

• Replace the IMRC actuator
• Clean the intake manifold
• Repair or replace damaged wiring

How to Prevent:

• Regular cleaning of the intake manifold
• Use fuel additives to reduce carbon build-up

Cost to Diagnose:
SGD 150 - 300

P2102 - Throttle Actuator Control Motor Circuit Low

Description:
This code indicates that the throttle actuator control motor circuit is reporting low voltage, leading to poor throttle control.

Symptoms:

• Poor throttle response
• Engine stalling or surging
• Check Engine Light on

Possible Causes:

• Faulty throttle actuator control motor
• Damaged wiring or connectors
• Throttle body failure

How to Fix:

• Replace the throttle actuator control motor
• Repair or replace damaged wiring
• Clean or replace the throttle body

How to Prevent:

• Regular throttle body and electrical system checks
• Ensure proper sensor maintenance

Cost to Diagnose:
SGD 150 - 300

P2135 - Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation

Description:
This code occurs when there is a voltage mismatch between the throttle/pedal position sensors A and B, affecting the vehicle's throttle control.

Symptoms:

• Poor throttle response
• Vehicle enters limp mode
• Check Engine Light on

Possible Causes:

• Faulty throttle position sensor
• Damaged wiring or connectors
• Throttle body issues

How to Fix:

• Replace the throttle position sensor
• Repair or replace damaged wiring
• Clean or replace the throttle body

How to Prevent:

• Regular throttle system checks
• Routine inspection of sensors during maintenance

Cost to Diagnose:
SGD 100 - 180

P2188 - System Too Rich at Idle (Bank 1)

Description:
This code is triggered when the air-fuel mixture is too rich (too much fuel) during idle conditions for Bank 1.

Symptoms:

• Black smoke from exhaust
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Faulty mass airflow (MAF) sensor
• Clogged fuel injectors
• Faulty oxygen sensor

How to Fix:

• Clean or replace the MAF sensor
• Clean or replace fuel injectors
• Replace the oxygen sensor

How to Prevent:

• Regular air intake system and fuel injector cleaning
• Routine sensor maintenance

Cost to Diagnose:
SGD 100 - 180

P2195 - O2 Sensor Signal Stuck Lean (Bank 1, Sensor 1)

Description:
This code occurs when the oxygen sensor in Bank 1, Sensor 1 detects a constant lean condition (too much air, not enough fuel).

Symptoms:

• Rough idling
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Faulty oxygen sensor
• Vacuum leak
• Fuel delivery problems

How to Fix:

• Replace the oxygen sensor
• Repair any vacuum leaks
• Check and repair the fuel system

How to Prevent:

• Regular maintenance of oxygen sensors
• Ensure no air intake leaks during routine checks

Cost to Diagnose:
SGD 80 - 150

P2227 - Barometric Pressure Sensor Circuit Range/Performance

Description:
This code is triggered when the barometric pressure sensor provides an incorrect signal, affecting engine air-fuel mixture calculations.

Symptoms:

• Poor engine performance
• Check Engine Light on
• Hesitation during acceleration

Possible Causes:

• Faulty barometric pressure sensor
• Damaged wiring or connectors
• Engine control module issues

How to Fix:

• Replace the barometric pressure sensor
• Repair or replace damaged wiring
• Reprogram or replace the engine control module

How to Prevent:

• Regular sensor checks during servicing
• Ensure proper electrical system maintenance

Cost to Diagnose:
SGD 150 - 250

P2270 - O2 Sensor Signal Stuck Lean (Bank 1, Sensor 2)

Description:
This code occurs when the downstream oxygen sensor in Bank 1, Sensor 2 reports a lean condition for an extended period.

Symptoms:

• Poor fuel economy
• Increased emissions
• Check Engine Light on

Possible Causes:

• Faulty oxygen sensor
• Exhaust leak
• Fuel injector issues

How to Fix:

• Replace the oxygen sensor
• Repair any exhaust leaks
• Clean or replace fuel injectors

How to Prevent:

• Regular exhaust system checks
• Ensure proper maintenance of oxygen sensors

Cost to Diagnose:
SGD 80 - 150

P2401 - EVAP System Leak Detection Pump Control Circuit Low

Description:
This code indicates that the EVAP system leak detection pump is reporting a low voltage condition, affecting its ability to detect leaks.

Symptoms:

• Check Engine Light on
• Fuel smell around the vehicle
• Failed emissions test

Possible Causes:

• Faulty EVAP leak detection pump
• Damaged wiring or connectors
• Faulty EVAP system control module

How to Fix:

• Replace the EVAP leak detection pump
• Repair or replace damaged wiring
• Replace the EVAP system control module

How to Prevent:

• Regular EVAP system checks
• Ensure proper electrical system functioning

Cost to Diagnose:
SGD 150 - 300

P2562 - Turbocharger Boost Control Position Sensor Circuit

Description:
This code indicates an issue with the turbocharger boost control position sensor, affecting turbocharger performance.

Symptoms:

• Loss of power
• Poor acceleration
• Check Engine Light on

Possible Causes:

• Faulty turbocharger boost control position sensor
• Damaged wiring or connectors
• Turbocharger issues

How to Fix:

• Replace the boost control position sensor
• Repair or replace damaged wiring
• Repair or replace the turbocharger

How to Prevent:

• Regular turbocharger system maintenance
• Ensure proper sensor checks during servicing

Cost to Diagnose:
SGD 150 - 300

P2610 - ECM/PCM Internal Engine Off Timer Performance

Description:
This code is triggered when the engine control module (ECM) detects an issue with its internal engine off timer, affecting vehicle performance.

Symptoms:

• Poor engine performance
• Difficulty starting the engine
• Check Engine Light on

Possible Causes:

• Faulty ECM
• Electrical issues
• Battery problems

How to Fix:

• Replace or reprogram the ECM
• Repair or replace damaged wiring
• Check and replace the battery if necessary

How to Prevent:

• Regular battery and ECM checks
• Ensure proper electrical system maintenance

Cost to Diagnose:
SGD 200 - 400

P2646 - A Rocker Arm Actuator System Performance/Stuck Off (Bank 1)

Description:
This code indicates an issue with the rocker arm actuator system in Bank 1, which controls variable valve timing.

Symptoms:

• Rough idling
• Poor acceleration
• Check Engine Light on

Possible Causes:

• Faulty rocker arm actuator
• Oil pressure issues
• Wiring or connector problems

How to Fix:

• Replace the rocker arm actuator
• Check and top up engine oil
• Repair or replace damaged wiring

How to Prevent:

• Regular oil changes
• Ensure proper maintenance of the valve timing system

Cost to Diagnose:
SGD 150 - 250

P2767 - Torque Converter Clutch Pressure Control Solenoid Circuit Low

Description:
This code is triggered when the torque converter clutch pressure control solenoid reports a low voltage condition, affecting transmission performance.

Symptoms:

• Poor acceleration
• Transmission slipping
• Check Engine Light on

Possible Causes:

• Faulty torque converter clutch solenoid
• Low transmission fluid
• Damaged wiring or connectors

How to Fix:

• Replace the torque converter clutch solenoid
• Check and top up transmission fluid
• Repair or replace damaged wiring

How to Prevent:

• Regular transmission fluid changes
• Ensure proper sensor and solenoid checks during maintenance

Cost to Diagnose:
SGD 150 - 300

P3400 - Cylinder Deactivation System Bank 1

Description:
This code occurs when there is an issue with the cylinder deactivation system in Bank 1, which is used to improve fuel efficiency.

Symptoms:

• Poor fuel economy
• Engine performance issues
• Check Engine Light on

Possible Causes:

• Faulty cylinder deactivation solenoid
• Oil pressure issues
• Wiring or connector problems

How to Fix:

• Replace the cylinder deactivation solenoid
• Check and top up engine oil
• Repair or replace damaged wiring

How to Prevent:

• Regular oil changes to ensure proper oil pressure
• Ensure routine maintenance of the engine’s deactivation system

Cost to Diagnose:
SGD 150 - 300

P3410 - Cylinder Deactivation System Bank 2

Description:
This code is similar to P3400 but relates to Bank 2, indicating an issue with the cylinder deactivation system, which helps improve fuel efficiency.

Symptoms:

• Rough idling
• Decreased fuel economy
• Check Engine Light on

Possible Causes:

• Faulty cylinder deactivation solenoid
• Low engine oil pressure
• Damaged wiring or connectors

How to Fix:

• Replace the cylinder deactivation solenoid
• Check and top up engine oil
• Repair or replace damaged wiring

How to Prevent:

• Regular oil checks and changes
• Maintain the engine’s deactivation system during servicing

Cost to Diagnose:
SGD 150 - 300

P3418 - Cylinder Deactivation/Intake Valve Control Circuit Performance (Bank 1)

Description:
This code indicates a problem with the cylinder deactivation or intake valve control circuit in Bank 1.

Symptoms:

• Poor engine performance
• Rough idling
• Check Engine Light on

Possible Causes:

• Faulty intake valve solenoid
• Wiring or connector issues
• Oil pressure problems

How to Fix:

• Replace the intake valve control solenoid
• Repair or replace damaged wiring
• Check and adjust oil pressure

How to Prevent:

• Regular inspection of the valve control system
• Ensure proper oil pressure during routine checks

Cost to Diagnose:
SGD 150 - 250

P3497 - Cylinder Deactivation System Bank 2

Description:
This code indicates an issue with the cylinder deactivation system in Bank 2, which helps improve fuel efficiency by shutting down some cylinders under light loads.

Symptoms:

• Decreased fuel efficiency
• Engine misfire
• Check Engine Light on

Possible Causes:

• Faulty cylinder deactivation solenoid
• Low oil pressure
• Wiring or connector problems

How to Fix:

• Replace the cylinder deactivation solenoid
• Check and top up oil levels
• Repair or replace damaged wiring

How to Prevent:

• Maintain proper oil levels and regular changes
• Routine maintenance of the cylinder deactivation system

Cost to Diagnose:
SGD 150 - 300

P3600 - Exhaust Gas Recirculation (EGR) Flow Control Circuit Malfunction

Description:
This code is triggered when the EGR system, which reduces nitrogen oxide emissions by recirculating exhaust gases, has a control circuit malfunction.

Symptoms:

• Rough idling
• Poor fuel economy
• Increased emissions

Possible Causes:

• Faulty EGR valve
• Blocked EGR passages
• Wiring or connector issues

How to Fix:

• Replace the EGR valve
• Clean EGR passages
• Repair or replace damaged wiring

How to Prevent:

• Regular cleaning of the EGR system
• Use fuel additives to reduce carbon build-up

Cost to Diagnose:
SGD 100 - 180

P3457 - Cylinder Deactivation System Bank 2 (Intake Valve Control Circuit)

Description:
This code is related to the intake valve control circuit for the cylinder deactivation system in Bank 2.

Symptoms:

• Rough engine performance
• Reduced fuel economy
• Check Engine Light on

Possible Causes:

• Faulty intake valve control solenoid
• Wiring or connector issues
• Oil pressure problems

How to Fix:

• Replace the intake valve control solenoid
• Repair or replace damaged wiring
• Check oil levels and pressure

How to Prevent:

• Routine inspection of intake valve control systems
• Regular oil changes to maintain pressure

Cost to Diagnose:
SGD 150 - 250

P3601 - Exhaust Gas Recirculation (EGR) Flow Control Circuit Range/Performance

Description:
This code indicates that the EGR flow control circuit is not operating within its expected range, leading to performance issues.

Symptoms:

• Poor engine performance
• Rough idling
• Increased emissions

Possible Causes:

• Faulty EGR valve
• Blocked or restricted EGR passages
• Wiring or sensor issues

How to Fix:

• Replace the EGR valve
• Clean or repair EGR passages
• Repair any faulty wiring

How to Prevent:

• Regular EGR system cleaning
• Routine maintenance of emissions control systems

Cost to Diagnose:
SGD 100 - 180

P3693 - Crankshaft Position Sensor Range/Performance

Description:
This code occurs when the crankshaft position sensor detects an issue with its signal or range, affecting engine timing.

Symptoms:

• Difficulty starting the engine
• Engine stalling
• Check Engine Light on

Possible Causes:

• Faulty crankshaft position sensor
• Damaged wiring or connectors
• Timing chain/belt issues

How to Fix:

• Replace the crankshaft position sensor
• Repair or replace damaged wiring
• Inspect the timing chain or belt

How to Prevent:

• Regular maintenance of the timing system
• Ensure proper sensor operation during vehicle servicing

Cost to Diagnose:
SGD 150 - 250

P3800 - Glow Plug Control Circuit Malfunction

Description:
This code is triggered when the glow plug control circuit in a diesel engine detects a fault, affecting the engine’s ability to start in cold conditions.

Symptoms:

• Difficulty starting the engine in cold weather
• Rough idling
• Check Engine Light on

Possible Causes:

• Faulty glow plug(s)
• Faulty glow plug control module
• Wiring or connector issues

How to Fix:

• Replace faulty glow plug(s)
• Replace the glow plug control module
• Repair or replace damaged wiring

How to Prevent:

• Regular checks of glow plugs during servicing
• Ensure proper operation of the control module in cold conditions

Cost to Diagnose:
SGD 100 - 200

P4500 - Turbocharger Boost Sensor Circuit Low Input

Description:
This code is triggered when the turbocharger boost sensor reports a signal that is lower than expected, leading to underperformance of the turbocharger.

Symptoms:

• Poor acceleration
• Loss of power
• Check Engine Light on

Possible Causes:

• Faulty turbo boost pressure sensor
• Turbocharger issues
• Wiring or connector problems

How to Fix:

• Replace the boost pressure sensor
• Repair or replace any damaged wiring
• Inspect and repair the turbocharger if needed

How to Prevent:

• Routine maintenance of the turbocharger system
• Regular checks of sensors during servicing

Cost to Diagnose:
SGD 150 - 300

P4501 - Turbocharger Boost Sensor Circuit High Input

Description:
This code occurs when the turbocharger boost sensor reports a signal that is higher than expected, possibly leading to overboost conditions.

Symptoms:

• Poor engine performance
• Engine knocking
• Check Engine Light on

Possible Causes:

• Faulty turbo boost pressure sensor
• Wastegate or bypass valve malfunction
• Wiring issues

How to Fix:

• Replace the turbo boost pressure sensor
• Repair or replace the wastegate or bypass valve
• Repair any damaged wiring

How to Prevent:

• Routine turbo system maintenance
• Ensure proper functioning of the wastegate and bypass valve

Cost to Diagnose:
SGD 150 - 300

P0440 - Evaporative Emission Control System Malfunction

Description:
This code is triggered when the EVAP system detects a general malfunction, which controls the release of fuel vapours from the fuel system into the atmosphere.

Symptoms:

• Check Engine Light on
• Fuel smell around the vehicle
• Poor fuel economy

Possible Causes:

• Loose or faulty gas cap
• Leaks in the EVAP system hoses
• Faulty EVAP purge valve or canister

How to Fix:

• Tighten or replace the gas cap
• Repair or replace damaged EVAP hoses
• Replace the EVAP purge valve or canister

How to Prevent:

• Ensure the gas cap is always tightly secured after refuelling
• Regularly inspect the EVAP system for leaks

Cost to Diagnose:
SGD 80 - 150

P0597 - Thermostat Heater Control Circuit/Open

Description:
This code indicates an issue with the thermostat heater control circuit, which controls the opening and closing of the engine thermostat to regulate temperature.

Symptoms:

• Engine overheating or running too cold
• Poor fuel economy
• Check Engine Light on

Possible Causes:

• Faulty thermostat
• Wiring or connector issues
• Faulty engine control module (ECM)

How to Fix:

• Replace the thermostat
• Repair or replace damaged wiring
• Reprogram or replace the ECM

How to Prevent:

• Routine cooling system maintenance
• Regular checks of the thermostat and its control circuit

Cost to Diagnose:
SGD 100 - 180

P0734 - Incorrect Gear Ratio (4th Gear)

Description:
This code is triggered when the transmission control module detects an incorrect gear ratio for 4th gear, leading to transmission performance issues.

Symptoms:

• Erratic shifting
• Transmission slipping
• Check Engine Light on

Possible Causes:

• Low transmission fluid
• Faulty transmission control module
• Worn transmission components

How to Fix:

• Check and top up transmission fluid
• Replace or reprogram the transmission control module
• Repair or replace worn transmission components

How to Prevent:

• Regular transmission fluid changes
• Routine maintenance of the transmission system

Cost to Diagnose:
SGD 150 - 300

P1127 - Long Term Fuel Trim Too Rich (Bank 1)

Description:
This code indicates that the long-term fuel trim in Bank 1 is running too rich, meaning the air-fuel mixture contains too much fuel over an extended period.

Symptoms:

• Poor fuel economy
• Black smoke from the exhaust
• Check Engine Light on

Possible Causes:

• Faulty mass airflow sensor (MAF)
• Clogged fuel injectors
• Fuel pressure regulator malfunction

How to Fix:

• Clean or replace the MAF sensor
• Clean or replace fuel injectors
• Replace the fuel pressure regulator

How to Prevent:

• Regular air intake system cleaning
• Routine checks of the fuel system and pressure regulator

Cost to Diagnose:
SGD 100 - 180

P1238 - Fuel Pump Control Module Circuit/Open

Description:
This code is triggered when the fuel pump control module detects an open circuit, affecting fuel delivery to the engine.

Symptoms:

• Poor acceleration
• Vehicle won’t start
• Check Engine Light on

Possible Causes:

• Faulty fuel pump control module
• Damaged wiring or connectors
• Faulty fuel pump

How to Fix:

• Replace the fuel pump control module
• Repair or replace damaged wiring
• Replace the fuel pump if necessary

How to Prevent:

• Regular checks of the fuel system and control module
• Ensure proper wiring and electrical connections

Cost to Diagnose:
SGD 150 - 250

P1400 - Differential Pressure Feedback EGR Circuit Low Input

Description:
This code indicates that the differential pressure feedback exhaust gas recirculation (EGR) sensor is detecting low input, affecting EGR system performance.

Symptoms:

• Poor engine performance
• Rough idling
• Check Engine Light on

Possible Causes:

• Faulty EGR valve
• Blocked EGR passages
• Wiring or sensor issues

How to Fix:

• Replace the EGR valve
• Clean the EGR passages
• Repair or replace the EGR sensor

How to Prevent:

• Regular cleaning of the EGR system
• Routine checks of the emissions control system

Cost to Diagnose:
SGD 100 - 180

P1604 - Startability Malfunction

Description:
This code is triggered when the engine control module (ECM) detects an issue affecting the engine’s ability to start properly.

Symptoms:

• Difficulty starting the engine
• Engine stalling
• Check Engine Light on

Possible Causes:

• Faulty ECM
• Battery or alternator problems
• Wiring or connector issues

How to Fix:

• Replace or reprogram the ECM
• Repair or replace damaged wiring
• Check and replace the battery or alternator

How to Prevent:

• Regular battery and electrical system checks
• Ensure proper ECM operation during servicing

Cost to Diagnose:
SGD 150 - 300

P1650 - Power Steering Pressure Switch Circuit Malfunction

Description:
This code occurs when there is a malfunction in the power steering pressure switch circuit, which affects power steering performance.

Symptoms:

• Stiff steering
• Engine idle speed may change when turning
• Check Engine Light on

Possible Causes:

• Faulty power steering pressure switch
• Damaged wiring or connectors
• Faulty power steering pump

How to Fix:

• Replace the power steering pressure switch
• Repair or replace damaged wiring
• Replace the power steering pump if necessary

How to Prevent:

• Routine power steering system maintenance
• Ensure proper fluid levels and check the pressure switch regularly

Cost to Diagnose:
SGD 120 - 200

P2107 - Throttle Actuator Control Module Processor

Description:
This code indicates a malfunction in the throttle actuator control module’s processor, which controls the throttle’s position.

Symptoms:

• Poor throttle response
• Vehicle enters limp mode
• Check Engine Light on

Possible Causes:

• Faulty throttle actuator control module
• Wiring or connector issues
• Faulty engine control module (ECM)

How to Fix:

• Replace the throttle actuator control module
• Repair or replace damaged wiring
• Replace or reprogram the ECM if necessary

How to Prevent:

• Regular throttle system maintenance
• Ensure proper ECM and electrical system checks

Cost to Diagnose:
SGD 150 - 300

P2263 - Turbo/Supercharger Boost System Performance

Description:
This code indicates a problem with the performance of the turbocharger or supercharger boost system, affecting the engine’s ability to generate power.

Symptoms:

• Poor acceleration
• Loss of power
• Check Engine Light on

Possible Causes:

• Faulty turbo/supercharger boost control solenoid
• Wastegate malfunction
• Leaks in the intake system

How to Fix:

• Replace the boost control solenoid
• Repair or replace the wastegate
• Fix any intake system leaks

How to Prevent:

• Regular turbo/supercharger system checks
• Routine maintenance of the intake and exhaust systems

Cost to Diagnose:
SGD 150 - 300

P2420 - Evaporative Emission System Vent Valve Control Circuit High

Description:
This code occurs when the EVAP system vent valve control circuit detects a higher-than-expected voltage, which may affect the system’s ability to manage fuel vapours.

Symptoms:

• Check Engine Light on
• Fuel smell around the vehicle
• Poor fuel economy

Possible Causes:

• Faulty EVAP vent valve
• Wiring or connector issues
• Faulty EVAP system control module

How to Fix:

• Replace the EVAP vent valve
• Repair or replace damaged wiring
• Replace the EVAP control module if necessary

How to Prevent:

• Regular EVAP system checks during vehicle maintenance
• Ensure proper operation of the fuel vapour management system

Cost to Diagnose:
SGD 150 - 250

P2714 - Pressure Control Solenoid D Performance/Stuck Off

Description:
This code indicates a malfunction in the pressure control solenoid D, which regulates hydraulic pressure in the transmission for optimal performance.

Symptoms:

• Erratic shifting
• Transmission slipping
• Check Engine Light on

Possible Causes:

• Faulty pressure control solenoid
• Low transmission fluid
• Wiring or connector issues

How to Fix:

• Replace the pressure control solenoid
• Check and top up transmission fluid
• Repair or replace damaged wiring

How to Prevent:

• Regular transmission fluid changes
• Routine maintenance of transmission solenoids

Cost to Diagnose:
SGD 150 - 300

P2769 - Torque Converter Clutch Pressure Control Solenoid Control Circuit Low

Description:
This code is triggered when the torque converter clutch pressure control solenoid reports a low voltage, affecting transmission performance.

Symptoms:

• Poor acceleration
• Transmission slipping
• Check Engine Light on

Possible Causes:

• Faulty torque converter clutch solenoid
• Low transmission fluid
• Wiring or connector issues

How to Fix:

• Replace the torque converter clutch solenoid
• Check and top up transmission fluid
• Repair or replace damaged wiring

How to Prevent:

• Regular transmission fluid changes
• Routine maintenance of the transmission system

Cost to Diagnose:
SGD 150 - 300

The above list provides a comprehensive overview of the top 150 most common OBD2 error codes and solutions encountered in vehicles across Singapore. These error codes often arise due to the city’s unique driving conditions, frequent stop-and-go traffic, and high levels of heat and humidity, which can impact various vehicle components and sensors.

Understanding these OBD-II codes and their meanings can help vehicle owners identify issues early, potentially avoiding more significant and costly repairs down the road. However, if the OBD-II error code you’re experiencing is not on this list, it’s advisable to consult a professional mechanic. Some OBD2 codes may be specific to certain vehicle models or less common, requiring specialized equipment and expertise to diagnose and resolve. By addressing these codes promptly with the help of a trained mechanic, you can maintain your vehicle’s performance, efficiency, and longevity in Singapore’s challenging driving environment.