OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Chassis generic / SAE

C0051

Power Steering Position Sensor Performance

The chassis or power steering control module has detected that the steering position signal is implausible compared to vehicle motion. Stability control may be limited because correct yaw and slip-angle calculation depends on a valid steering angle.

SystemChassis
Typegeneric / SAE
GroupC0
Range / number– / 51

Possible causes

  • Steering angle sensor not calibrated after alignment or repair high
  • Steering angle sensor failed medium
  • Signal path through clock spring degraded low

Symptoms

  • ABS warning light on
  • ESC/stability control deactivated
  • Possible reduced brake assist
  • Speedometer may behave erratically

Inspection / repair

  • Difficulty: medium
  • DIY: shop recommended
  • Estimated cost: 80–600 €
  • Estimated time: 0.5–2.5 h
  • Component: steering angle sensor
  • Component: power steering module
  • Component: chassis control module

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication