ABS and brakes

C0051 — Steering Wheel Position Sensor Circuit Fault

Severity: medium Drive with care, to a shop

What C0051 means

The stability control (ESC) module compares the steering angle sensor signal with wheel speed and yaw or lateral acceleration data. If the signal is missing, out of range, or doesn't agree with the other sensors, it sets C0051. ESC is usually disabled until the fault is repaired and the sensor is calibrated.

Symptoms

  • ESC warning light on
  • Steering angle sensor fault message
  • Stability and traction control disabled
  • ABS light may also be on
  • Steering angle reading doesn't read zero with wheels straight

Possible causes

  1. Worn or broken clock spring in the steering column
  2. Steering angle sensor not calibrated after an alignment or steering repair
  3. Internal sensor failure
  4. Damaged wiring or poor connector contact
  5. Corroded terminals or a power or ground problem at the sensor
  6. ESC module or CAN bus fault (less common)

How to diagnose

  1. Scan all modules, save the data, and look for related ABS, CAN, or wheel speed sensor codes.
  2. View steering angle in live data: it should read near zero with wheels straight and change smoothly as you turn.
  3. Inspect the sensor connector and clock spring wiring for damage, corrosion, or chafing.
  4. Test sensor power, ground, and signal circuits against the factory wiring diagram.
  5. Check wheel alignment and make sure the steering wheel sits straight after any alignment.
  6. Perform the steering angle sensor zero-point calibration with a capable scan tool.
  7. Clear codes and road test to confirm the fault doesn't return.

Common fixes

  • Calibrate the steering angle sensor
  • Replace the clock spring
  • Replace the steering angle sensor
  • Repair the wiring harness or connector
  • Redo the alignment, then recalibrate the sensor

Questions and answers

Can I drive with code C0051?

Yes, carefully, but ESC is probably off and won't help in a skid. Avoid high speeds and sudden maneuvers, especially on wet or slippery roads.

Do I need to calibrate the sensor after an alignment?

On many vehicles, yes. After an alignment or steering repair the sensor's zero point must be set with a scan tool, otherwise the module sees a mismatch and turns on the ESC light.

What most often causes C0051?

Most often it's a lost calibration or a worn clock spring in the steering column. Live steering angle data and a wiring check will point to the exact cause.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.