C051DMulti-axis Acceleration Sensor Module A Missing Calibration
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- The module holds no valid zero point or mounting orientation, typically after it or the brake controller was replaced and the setup step was skipped. Corrections like these live in non-volatile memory: Kelsey-Hayes measures the offset of the whole assembly on a turning stand and adds the in-car tilt. GM's Saab 9-4x shows the workshop side: a new multi-axis module (called IMU in the programming tool) must first be configured, then the yaw sensor learned on level ground. On its Super Cruise controller GM files missing offset or orientation learning and a detected swap of the high-performance IMU under C0520 instead. No public source uses C051D itself. Stability control stays off until the learn is done.
- What you may notice
- ESC warning lamp on right after a repair
- Stability and traction control unavailable
- Driver assistance such as adaptive cruise may be disabled
- Likely causes
- LikelyModule A or brake control module replaced without configuration and yaw sensor learn
- PossibleLearn procedure aborted, e.g. vehicle not level or voltage dropped
- RareStored calibration lost after software update or module fault
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.