Block of codes
C06xx codes: steering, brakes and wheel speed sensors
This block brings together the codes from C0606 to C066F 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.
Steering and suspension
Steering and suspension: the steering angle sensor and the power steering, which stability control and the driver aids also rely on.
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.
The 79 codes of the block
- C0606Steering wheel angle sensor, circuit: signal low
- C0607Steering wheel angle sensor, circuit: signal high
- C0608Steering wheel angle sensor, circuit: performance
- C0609Park brake switch, circuit: malfunction
- C060APark brake switch: stuck
- C060BLeft park brake actuator, control circuit open
- C060CLeft park brake actuator, control circuit: signal low
- C060DLeft park brake actuator, control circuit: signal high
- C060ELeft park brake actuator: performance or stuck off
- C060FLeft park brake actuator: stuck on
- C0611Right park brake actuator, control circuit: signal low
- C0612Right park brake actuator, control circuit: signal high
- C0613Right park brake actuator: performance or stuck off
- C0614Right park brake actuator: stuck on
- C0616Park brake control module, control circuit: performance
- C0617Park brake control module, control circuit: signal low
- C0618Park brake control module, control circuit: signal high
- C0619Brake pedal position sensor A: offset learning limit exceeded
- C061ABrake pedal position sensor B: offset learning limit exceeded
- C061BECM request - forced traction control disable
- C061CVariable effort steering actuator, control circuit open
- C061DVariable effort steering actuator, control circuit: signal low
- C061EVariable effort steering actuator, control circuit: signal high
- C061FVariable effort steering actuator, control circuit: performance
- C0621Variable effort steering lock/safety actuator, control circuit: signal low
- C0622Variable effort steering lock/safety actuator, control circuit: signal high
- C0623Variable effort steering lock/safety actuator, control circuit: performance
- C0624Variable effort steering sensor, circuit: malfunction
- C0625Variable effort steering sensor, circuit: range/performance
- C0626Variable effort steering sensor, circuit: signal low
- C0627Variable effort steering sensor, circuit: signal high
- C0628Variable effort steering module: performance
- C0629Variable effort steering control module: incorrect component installed
- C062AVariable effort steering module temperature: too high
- C062BVariable effort steering module temperature: too low
- C062CBrake booster motor B: performance
- C062DABS valves: range/performance
- C0631Front axle disconnect actuator: malfunction
- C0632Front axle disconnect, control circuit: malfunction
- C0633Front half shaft speed sensor: malfunction
- C0634Brake pressure sensor A/B: correlation fault
- C0649Brake pressure sensor M, circuit open
- C064ABrake pressure sensor M, circuit: signal high
- C064BBrake pressure sensor M, circuit: signal low
- C064CBrake pressure sensor M: range/performance
- C064DBrake pressure sensor N, circuit open
- C064EBrake pressure sensor N, circuit: signal high
- C064FBrake pressure sensor N, circuit: signal low
- C0650Brake pressure sensor N: range/performance
- C0651Left front wheel speed sensor B, circuit open
- C0652Left front wheel speed sensor B: range/performance
- C0653Left front wheel speed sensor B, circuit: signal low
- C0654Left front wheel speed sensor B, circuit: signal high
- C0655Left front wheel speed sensor B: intermittent/erratic
- C0656Left front wheel speed sensor B: correlation fault
- C0657Left front wheel speed sensor B: incorrect component installed
- C0658Right front wheel speed sensor B, circuit open
- C0659Right front wheel speed sensor B: range/performance
- C065ARight front wheel speed sensor B, circuit: signal low
- C065BRight front wheel speed sensor B, circuit: signal high
- C065CRight front wheel speed sensor B: intermittent/erratic
- C065DRight front wheel speed sensor B: correlation fault
- C065ERight front wheel speed sensor B: incorrect component installed
- C065FLeft rear wheel speed sensor B, circuit open
- C0661Left rear wheel speed sensor B, circuit: signal low
- C0662Left rear wheel speed sensor B, circuit: signal high
- C0663Left rear wheel speed sensor B: intermittent/erratic
- C0664Left rear wheel speed sensor B: correlation fault
- C0665Left rear wheel speed sensor B: incorrect component installed
- C0666Right rear wheel speed sensor B, circuit open
- C0667Right rear wheel speed sensor B: range/performance
- C0668Right rear wheel speed sensor B, circuit: signal low
- C0669Right rear wheel speed sensor B, circuit: signal high
- C066ARight rear wheel speed sensor B: intermittent/erratic
- C066BRight rear wheel speed sensor B: correlation fault
- C066CRight rear wheel speed sensor B: incorrect component installed
- C066DService/park brake chamber pressure sensor: malfunction
- C066EService/park brake chamber pressure: too high
- C066FService/park brake chamber pressure: too low
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