Block of codes
C00xx codes: brakes, ABS and wheel sensors
This block brings together the codes from C0001 to C00A8 in the glossary. Open yours to see what it means, its causes and whether you can keep driving.
Reviewed by Daniel Morales, founder of Reprorace SL, on
What this block covers
Brakes and stability
ABS, stability control and their sensors (wheel speed, brake pedal, pressure). With a fault here, ABS or stability control may be switched off.
Driveline
Four-wheel drive (4WD/AWD): the transfer case, the differentials, the clutches that share the torque between the axles, and their sensors. With a fault here, the car usually falls back to driving one axle only.
Steering and suspension
Steering and suspension: the steering angle sensor and the power steering, which stability control and the driver aids also rely on.
The 77 codes of the block
- C0001TCS control channel A valve 1: malfunction
- C0002TCS control channel A valve 2: malfunction
- C0003TCS control channel B valve 1: malfunction
- C0004TCS control channel B valve 2: malfunction
- C0010Left front inlet control: malfunction
- C0011Left front outlet control: malfunction
- C0012Left front hydraulic release: too long
- C0014Right front inlet control: malfunction
- C0015Right front outlet control: malfunction
- C0016Right front hydraulic release: too long
- C0018Left rear inlet control: malfunction
- C0019Left rear outlet control: malfunction
- C001ALeft rear hydraulic release: too long
- C001CRight rear inlet control: malfunction
- C001DRight rear outlet control: malfunction
- C001ERight rear hydraulic release: too long
- C0020ABS pump motor control: malfunction
- C0024Brake pedal feedback pressure solenoid, circuit: malfunction
- C0031Left front wheel speed sensor: malfunction
- C0032Left front wheel speed sensor supply: malfunction
- C0034Right front wheel speed sensor: malfunction
- C0035Right front wheel speed sensor supply: malfunction
- C0037Left rear wheel speed sensor: malfunction
- C0038Left rear wheel speed sensor supply: malfunction
- C0039Right rear tone wheel: malfunction
- C003ARight rear wheel speed sensor: malfunction
- C003BRight rear wheel speed sensor supply: malfunction
- C003CRear tone wheel: malfunction
- C003DRear wheel speed sensor: malfunction
- C003ERear wheel speed sensor supply: malfunction
- C003FWheel speed sensors rotation direction: correlation fault
- C0040Brake pedal switch A: malfunction
- C0045Brake pressure sensor B: malfunction
- C0047Brake booster pressure sensor: malfunction
- C0048Brake booster travel sensor: malfunction
- C0049Brake fluid level: malfunction
- C004ABrake lining wear sensor: malfunction
- C004BBrake fluid level sensor/switch, circuit open
- C004CBrake booster motor A position sensor: learning limit exceeded
- C004DBrake system pressure: slow response
- C004EBrake system pressure control valve actuator: stuck
- C004FABS control module: over temperature
- C0051Steering wheel position sensor: malfunction
- C0054Steering wheel position sensor signal C: malfunction
- C0055Steering wheel position sensor signal D: malfunction
- C0069Yaw rate/longitudinal acceleration sensors: malfunction
- C006AMulti-axis acceleration sensor: malfunction
- C006BStability system active: too long
- C006CStability system: malfunction
- C00712/4 wheel drive status input: malfunction
- C0072Brake temperature: too high
- C0073Delivered driving torque: malfunction
- C0074Requested driving torque: malfunction
- C0075Brake pedal position: performance
- C0082Brake system malfunction indicator: malfunction
- C0089TCS disable switch: malfunction
- C008ATCS mode control: malfunction
- C00924WD/AWD power transfer unit position sensor B: malfunction
- C00934WD/AWD power transfer unit temperature sensor: malfunction
- C00944WD/AWD rear differential unit temperature sensor: malfunction
- C00954WD/AWD rear differential unit actuator A: malfunction
- C00964WD/AWD rear differential unit actuator A data: malfunction
- C00974WD/AWD rear differential unit actuator B: malfunction
- C00984WD/AWD rear differential unit actuator B data: malfunction
- C009A4WD/AWD rear differential unit actuator A position sensor B: malfunction
- C009C4WD/AWD rear differential unit actuator A position sensor: correlation fault
- C009D4WD/AWD rear differential unit actuator B position sensor A: malfunction
- C009E4WD/AWD rear differential unit actuator B position sensor B: malfunction
- C00A04WD/AWD rear differential unit actuator B position sensor: correlation fault
- C00A1Driveline control module: malfunction
- C00A2Driveline control module power transfer unit control circuit driver: malfunction
- C00A3Driveline control module rear differential unit A control circuit driver: malfunction
- C00A4Driveline control module rear differential unit B control circuit driver: malfunction
- C00A5Driveline control module transfer case unit control circuit driver: malfunction
- C00A64WD/AWD transfer case unit actuator: malfunction
- C00A74WD/AWD transfer case unit actuator position sensor A: malfunction
- C00A84WD/AWD transfer case unit actuator position sensor B: malfunction
Other blocks
Read your car's fault codes on your phone
With an ECO-LITE in the OBD socket you see the codes in your account, with the data captured when the fault happened, and your workshop can check them remotely, always with your permission.
Keep reading
- OBD fault codes: what each one means
- Check engine light on: what to do
- How to read and clear your car's fault codes
- Will your car pass its MOT or inspection with the engine light on?
- Wi-Fi OBD2 reader: which one to choose
- Reading fault codes by car make
- Remote OBD diagnostics: what it is, how it works and what it can't do
- Vehicle diagnostics glossary