Check-engine codes
What does my check-engine code mean?
Plain-English explanations for OBD-II trouble codes: what the code means, the most likely causes, symptoms, and how much labour a repair usually takes.
C0 codes · Chassis
- C0099ABS Control Module Internal Fault
- C009A4WD/AWD Rear Differential Unit Actuator A Position Sensor B
- C009B4WD/AWD Rear Differential Unit Actuator A Position Sensor C
- C009C4WD/AWD Rear Differential Unit Actuator A Position Sensor Correlation
- C009D4WD/AWD Rear Differential Unit Actuator B Position Sensor A
- C009E4WD/AWD Rear Differential Unit Actuator B Position Sensor B
- C009F4WD/AWD Rear Differential Unit Actuator B Position Sensor C
- C00A04WD/AWD Rear Differential Unit Actuator B Position Sensor Correlation
- C00A1Driveline Control Module
- C00A2Driveline Control Module Power Transfer Unit Control Circuit Driver
- C00A3Driveline Control Module Rear Differential Unit A Control Circuit Driver
- C00A4Driveline Control Module Rear Differential Unit B Control Circuit Driver
- C00A5Driveline Control Module Transfer Case Unit Control Circuit Driver
- C00A64WD/AWD Transfer Case Unit Actuator
- C00A74WD/AWD Transfer Case Unit Actuator Position Sensor A
- C00A84WD/AWD Transfer Case Unit Actuator Position Sensor B
- C0110ABS Pump Motor Circuit Malfunction
- C0111ABS Activation Excessively Long
- C0112ABS Activation Frequency Too High
- C0121Valve Relay Circuit Malfunction
- C0128Low Brake Fluid Indicated
- C0131Master Cylinder Pressure Sensor Range/Performance
- C0136Stop Lamp Switch Circuit
- C0141Left Front ABS Inlet Solenoid Circuit
- C0146Left Front ABS Outlet Solenoid Circuit
- C0148Right Front ABS Outlet Solenoid B Circuit Malfunction
- C0151Right Front ABS Inlet Solenoid Circuit
- C0153Right Front ABS Inlet Solenoid B Circuit Malfunction
- C0156Right Front ABS Outlet Solenoid Circuit
- C0158Left Rear ABS Inlet Solenoid Circuit Malfunction
- C0161ABS/TCS Brake Switch Circuit
- C0163Left Rear ABS Outlet Solenoid Circuit Malfunction
- C0168Right Rear ABS Inlet Solenoid Circuit Malfunction
- C0173Right Rear ABS Outlet Solenoid Circuit Malfunction
- C0185Lateral Acceleration Sensor Range/Performance
- C0186Lateral Acceleration Sensor Circuit
- C0196Yaw Rate Sensor Circuit
- C0200ABS Solenoid Valve Front Left Circuit
- C0201Brake Fluid Level Switch Circuit
- C0202Brake Pedal Position Sensor
- C0203ABS Solenoid Valve Front Right Circuit
- C0205Stop Lamp Switch Circuit
- C0206ABS Solenoid Valve Rear Left Circuit
- C0209ABS Solenoid Valve Rear Right Circuit
- C0220ABS Valve Block Supply Voltage
- C0225ABS Valve Relay Circuit
- C0230Brake Pedal Position Sensor Circuit
- C0234Wheel Speed Sensor Frequency Error
- C0235Wheel Speed Sensor Signal Erratic
- C0237Loss of Speed Sensor Signal Front Left
- C0238Speed Wheel-to-Wheel Mismatch
- C0240Brake Pressure Sensor
- C0241ABS Warning Lamp Control Circuit
- C0242PCM Indicated ABS Malfunction
- C0244PWM Brake Pressure Modulation Circuit
- C0245Wheel Speed Sensor Frequency Mismatch
- C0246ABS/TCS Control Module Internal Performance
- C0250Power Steering Pump Pressure
- C0252Pump Motor Ground Circuit Open
- C0258Brake Booster Vacuum Sensor Circuit
- C0265EBCM Relay Circuit
- C0266Active Brake Booster
- C0267Brake Pump Motor Circuit
- C0268Brake Pump Run Time Exceeded
- C0269Brake Vacuum Sensor
- C0273Brake Booster Pressure Sensor Circuit Malfunction
- C0277Brake Booster Vacuum Sensor Circuit Malfunction
- C0279Brake Booster Boost Sensor Circuit Malfunction
- C0287ESP Performance
- C0288Yaw Rate Sensor Range
- C0290Brake Pedal Stroke Sensor Circuit Malfunction
- C0291Brake Pedal Apply Sensor Circuit Malfunction
- C0295Steering Sensor Indicates Bias
- C0300Inlet Valve Front Left Performance
- C0301Air Suspension Compressor Relay
- C0302Outlet Valve Front Left Performance
- C0303Inlet Valve Front Right Performance
- C0304Outlet Valve Front Right Performance
- C0305Inlet Valve Rear Left Performance
- C0306Ride Height Sensor Front Left
- C0307Inlet Valve Rear Right Performance
- C0308Ride Height Sensor Front Right
- C0309Outlet Valve Rear Right Performance
- C0310Ride Height Sensor Rear Left
- C0312Ride Height Sensor Rear Right
- C0317Compressor Relay Circuit
- C0327Encoder Motor
- C03744WD Drive Coupling
- C0376Front Axle Disconnect
- C0387Transfer Case Position Sensor
- C0388Transfer Case High Range Switch Circuit Malfunction
- C0389Transfer Case Low Range Switch Circuit Malfunction
- C03994WD Mode Switch Circuit Malfunction
- C0400Traction Control Solenoid Valve Circuit
- C0401Traction Control Switch Circuit
- C0402Traction Control Lamp Circuit
- C0405Traction Control Active Too Long
- C0410Adaptive Cruise Control Sensor Circuit Malfunction
- C0420Adaptive Cruise Control Module Internal Performance
- C0440Steering Wheel Position Sensor Circuit
Code data: OBDex open dataset (CC0), reviewed and rewritten for drivers. Always confirm a diagnosis before replacing parts.