Cause
Faulty steering angle sensor
The sensor reporting how far and how fast the steering wheel is turned. Stability control is meaningless without it, because the whole intervention is a comparison between where the driver is pointing and where the car is actually going.
Calibration is the first thing to eliminate and it is not a formality. The sensor measures angle relative to straight ahead and must be told where that is. An alignment, a rack, a clock spring, a battery disconnection or a module swap all lose the reference — leaving a healthy sensor reading wrong.
The clock spring is the second. The sensor sits behind the steering wheel and its signals pass through the coiled ribbon cable that also carries the horn and the airbag. That ribbon is a wearing part. An airbag warning light alongside a steering angle code points there rather than at the sensor.
The sensor itself is usually the last answer, and on many vehicles it is not separately available — it comes as part of the clock spring assembly, which is worth knowing before pricing the job.
Typically specialist work. Needs equipment or training most home workshops do not have.
Codes this can cause (6)
Codes where this is a likely explanation first, rather than merely a possible one.
- C0051 Steering Wheel Position Sensor Likely for this code Moderate
- C0052 Steering Wheel Position Sensor Signal A Likely for this code Moderate
- C0053 Steering Wheel Position Sensor Signal B Likely for this code Moderate
- C0054 Steering Wheel Position Sensor Signal C Likely for this code Moderate
- C0055 Steering Wheel Position Sensor Signal D Likely for this code Moderate
- U0126 Lost Communication With Steering Angle Sensor Module Moderate
Information, not instruction
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