Block of codes
C05xx codes: wheel, steering and acceleration sensors
This block brings together the codes from C0502 to C05FF 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 212 codes of the block
- C0502Left front wheel speed sensor A, circuit: signal low
- C0503Left front wheel speed sensor A, circuit: signal high
- C0504Left front wheel speed sensor A: intermittent/erratic
- C0506Right front wheel speed sensor A, circuit open
- C0507Right front wheel speed sensor A: range/performance
- C0508Right front wheel speed sensor A, circuit: signal low
- C0509Right front wheel speed sensor A, circuit: signal high
- C050ARight front wheel speed sensor A: intermittent/erratic
- C050BRight front wheel speed sensor A: correlation fault
- C050CLeft rear wheel speed sensor A, circuit open
- C050DLeft rear wheel speed sensor A: range/performance
- C050ELeft rear wheel speed sensor A, circuit: signal low
- C050FLeft rear wheel speed sensor A, circuit: signal high
- C0511Left rear wheel speed sensor A: correlation fault
- C0512Right rear wheel speed sensor A, circuit open
- C0513Right rear wheel speed sensor A: range/performance
- C0514Right rear wheel speed sensor A, circuit: signal low
- C0515Right rear wheel speed sensor A, circuit: signal high
- C0516Right rear wheel speed sensor A: intermittent/erratic
- C0517Right rear wheel speed sensor A: correlation fault
- C0518Left front wheel speed sensor: mechanical fault
- C0519Right front wheel speed sensor: mechanical fault
- C051ALeft rear wheel speed sensor: mechanical fault
- C051BRight rear wheel speed sensor: mechanical fault
- C051CMulti-axis acceleration sensor module A: range/performance
- C051DMulti-axis acceleration sensor module A: missing calibration
- C051EMulti-axis acceleration sensor module A: intermittent/erratic
- C051FMulti-axis acceleration sensor module A: correlation fault
- C0521Multi-axis acceleration sensor module B: range/performance
- C0522Multi-axis acceleration sensor module B: missing calibration
- C0523Multi-axis acceleration sensor module B: intermittent/erratic
- C0524Multi-axis acceleration sensor module B: correlation fault
- C0525Multi-axis acceleration sensor module B: malfunction
- C0526Steering angle sensor module: malfunction
- C0527Steering angle sensor module: mechanical fault
- C0528Steering angle sensor module: range/performance
- C0529Steering angle sensor module: missing calibration
- C052ASteering angle sensor module: correlation fault
- C052BABS pump motor control: range/performance
- C052CABS pump motor, control circuit open
- C052DABS pump motor, control circuit: signal high
- C052EABS pump motor, control circuit: signal low
- C052FABS pump motor, supply voltage circuit open
- C0530Motor control A: range/performance
- C0531Motor control A, circuit open
- C0532Motor control A, circuit: signal high
- C0533Motor control A, circuit: signal low
- C0534Motor control A, supply voltage circuit open
- C0535Motor control B: range/performance
- C0536Motor control B, circuit open
- C0537Motor control B, circuit: signal high
- C0538Motor control B, circuit: signal low
- C0539Motor control B, supply voltage circuit open
- C053AABS valves: missing calibration
- C053BABS valves, supply voltage circuit open
- C053CWheel speed sensor generic: range/performance
- C053DBrake pressure sensor A: range/performance
- C053EBrake pressure sensor A, circuit: signal low
- C053FBrake pressure sensor A, circuit: signal high
- C0541Brake pressure sensor B: range/performance
- C0542Brake pressure sensor B, circuit: signal low
- C0543Brake pressure sensor B, circuit: signal high
- C0544Brake pressure sensor B, circuit open
- C0547Vacuum sensor, supply voltage circuit open
- C0548Vacuum sensor supply voltage: too low
- C0549Vacuum sensor A, circuit open
- C054AVacuum sensor A: range/performance
- C054BVacuum sensor A, circuit: signal low
- C054CVacuum sensor A, circuit: signal high
- C054DVacuum sensor B, circuit open
- C054EVacuum sensor B: range/performance
- C054FVacuum sensor B, circuit: signal low
- C0551Longitudinal acceleration sensor, circuit open
- C0552Longitudinal acceleration sensor: range/performance
- C0553Longitudinal acceleration sensor, circuit: signal low
- C0554Longitudinal acceleration sensor, circuit: signal high
- C0557Left rear wheel speed sensor A: incorrect component installed
- C0558Right rear wheel speed sensor A: incorrect component installed
- C0559Power steering control module: range/performance - rear
- C055AABS pump motor, supply voltage circuit A: signal high
- C055BABS pump motor, supply voltage circuit A: signal low
- C055CABS pump motor, supply voltage circuit A: range/performance
- C055DBrake hydraulic, circuit B: leak
- C055EBrake hydraulic, circuit A: leak
- C055FBSCM/EBBC hydraulic unit: performance
- C0562Brake pedal position sensor, supply voltage circuit open
- C0564ABS control module system voltage: too low
- C0565ABS control module system voltage: too high
- C0566Brake booster solenoid, circuit open
- C0567Brake booster solenoid, circuit: signal low
- C0568Brake booster solenoid, circuit: signal high
- C0569Brake booster solenoid, circuit: performance
- C056ABrake booster pressure sensor, power supply circuit: malfunction
- C056BBrake pressure sensor A: intermittent/erratic
- C056CBrake pressure sensor B: intermittent/erratic
- C056DBrake pedal position sensor, supply voltage circuit: signal low
- C056EBrake pedal position sensor, supply voltage circuit: signal high
- C056FBrake booster travel sensor, circuit: signal low
- C0570Brake booster travel sensor, circuit: signal high
- C0579Brake booster temperature sensor B, circuit: signal low
- C057ABrake booster temperature sensor B, circuit: signal high
- C057BBrake booster temperature sensor B, circuit open
- C057CBrake booster temperature sensor B, circuit: range/performance
- C057DBrake booster temperature sensor, circuit B: intermittent/erratic
- C057EBrake booster temperature sensor A/B: correlation fault
- C057FBrake booster motor A phase U-V-W, circuit open
- C0580Brake booster motor A phase U-V-W, circuit: signal low
- C0582Brake booster motor A phase U-V-W, circuit: range/performance
- C0584Brake booster motor B phase U-V-W, circuit: signal low
- C0585Brake booster motor B phase U-V-W, circuit: signal high
- C0586Brake booster motor B phase U-V-W, circuit: range/performance
- C0587Brake booster motor A position sensor, circuit open
- C0588Brake booster motor A position sensor, circuit: signal low
- C0589Brake booster motor A position sensor, circuit: signal high
- C058ABrake booster motor A position sensor, circuit: range/performance
- C058BBrake booster motor B position sensor, circuit open
- C058CBrake booster motor B position sensor, circuit: signal low
- C058DBrake booster motor B position sensor, circuit: signal high
- C058EBrake booster motor B position sensor, circuit: range/performance
- C0590Brake booster motor A phase U-V-W current: too high
- C0591Brake booster motor A phase U-V-W current: too low
- C0592Brake booster motor B phase U-V-W current: too high
- C0593Brake booster motor B phase U-V-W current: too low
- C0595Brake booster internal power driver: range/performance
- C0596Brake booster motor A current sensor, circuit: range/performance
- C0597Brake system control module A: performance
- C0598Brake system control module B: performance
- C0599Brake booster control module: missing calibration
- C059ARear power steering control module: missing calibration
- C059BBrake pressure sensor B: missing calibration
- C05A3Wheel speed sensors, supply circuit: signal high
- C05A4Wheel speed sensors, supply circuit: signal low
- C05A5ABS pump motor supply voltage B, circuit open
- C05A6ABS pump motor supply voltage B, circuit: signal high
- C05A7ABS pump motor supply voltage B, circuit: signal low
- C05A8ABS pump motor supply voltage B, circuit: range/performance
- C05A9ABS pump motor supply voltage circuit A/B: correlation fault
- C05AAABS pump motor temperature: too high
- C05ABBrake blending separation valve: performance
- C05ACBrake blending separation valve: stuck closed
- C05AEABS pump motor: calibration not learned
- C05AFBrake booster motor B current sensor, circuit: range/performance
- C05B0Brake hydraulic, circuit C: leak
- C05B1Brake hydraulic, circuit D: leak
- C05B2Correlation fault between steering wheel angle sensor signal and yaw rate sensor signal
- C05B8Brake booster motor A position sensor, supply circuit open
- C05B9Brake booster motor A position sensor, supply circuit: signal low
- C05BABrake booster motor A position sensor, supply circuit: signal high
- C05BBBrake booster motor A position sensor, supply circuit: range/performance
- C05BCBrake booster motor B position sensor, supply circuit open
- C05BDBrake booster motor B position sensor, supply circuit: signal low
- C05BEBrake booster motor B position sensor, supply circuit: signal high
- C05BFBrake booster motor B position sensor, supply circuit: range/performance
- C05C0Brake pedal position sensor A: not learned
- C05C1Brake pedal position sensor B: not learned
- C05C2Brake booster motor A: over temperature
- C05C3Brake booster motor A, supply circuit: malfunction
- C05C9Brake pressure sensor, supply circuit: malfunction
- C05CABrake master cylinder piston position sensor A circuit voltage: too high
- C05CBBrake master cylinder piston position sensor A circuit voltage: too low
- C05CCBrake master cylinder piston position sensor A, circuit: range/performance
- C05CDBrake master cylinder piston position sensor B circuit voltage: too high
- C05CEBrake master cylinder piston position sensor B circuit voltage: too low
- C05CFBrake master cylinder piston position sensor B, circuit: range/performance
- C05D0Brake master cylinder piston position sensor A/B: correlation fault
- C05D1Brake master cylinder piston position sensor, supply circuit: malfunction
- C05D2Master cylinder piston position: higher than expected
- C05D3Driver applied pressure: higher than expected
- C05D4Brake master cylinder piston position sensor: calibration not learned
- C05D5Brake master cylinder cut off valve: malfunction
- C05D6Power steering control module: processor fault
- C05D7Brake transmission shift interlock (BTSI), control circuit: malfunction
- C05D84WD/AWD clutch A actuator, control circuit open
- C05D94WD/AWD clutch A actuator, control circuit: performance
- C05DA4WD/AWD clutch A actuator, control circuit: signal low
- C05DB4WD/AWD clutch A actuator, control circuit: signal high
- C05DC4WD/AWD clutch A temperature: too high
- C05DD4WD/AWD clutch A: performance or stuck disengaged
- C05DE4WD/AWD clutch A: stuck engaged
- C05DF4WD/AWD clutch A engagement: fault
- C05E04WD/AWD clutch A position sensor, circuit: malfunction
- C05E14WD/AWD clutch A position sensor, circuit: range/performance
- C05E24WD/AWD clutch A position sensor, circuit: signal low
- C05E34WD/AWD clutch A position sensor, circuit: signal high
- C05E44WD/AWD clutch A position sensor, circuit: intermittent
- C05E54WD/AWD clutch A position: not learned
- C05E64WD/AWD clutch A position control: error
- C05E74WD/AWD clutch B actuator, control circuit open
- C05E84WD/AWD clutch B actuator, control circuit: performance
- C05E94WD/AWD clutch B actuator, control circuit: signal low
- C05EA4WD/AWD clutch B actuator, control circuit: signal high
- C05EB4WD/AWD clutch B temperature: too high
- C05EC4WD/AWD clutch B: performance or stuck disengaged
- C05ED4WD/AWD clutch B: stuck engaged
- C05EE4WD/AWD clutch B engagement: fault
- C05EF4WD/AWD clutch B position control: error
- C05F0Rear drive shaft speed sensor, circuit: signal low
- C05F1Rear drive shaft speed sensor, circuit: signal high
- C05F2Rear drive shaft speed sensor, circuit: intermittent
- C05F3Rear drive shaft speed sensor, circuit: malfunction
- C05F4Rear drive shaft speed sensor, circuit: range/performance
- C05F54WD/AWD range actuator, control circuit open
- C05F64WD/AWD range actuator, control circuit: performance
- C05F74WD/AWD range actuator, control circuit: signal low
- C05F84WD/AWD range actuator, control circuit: signal high
- C05F94WD/AWD range actuator temperature: too high
- C05FA4WD/AWD range actuator: performance or stuck
- C05FB4WD/AWD range actuator position sensor, circuit: malfunction
- C05FC4WD/AWD range actuator position sensor, circuit: range/performance
- C05FD4WD/AWD range actuator position sensor, circuit: signal low
- C05FE4WD/AWD range actuator position sensor, circuit: signal high
- C05FF4WD/AWD range actuator position: not learned
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