C0522Multi-axis Acceleration Sensor Module B Missing Calibration
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- Module B lacks its stored zero point or installation data, so its readings cannot be trusted. No manufacturer publishes C0522, and which unit carries the letter B is not documented. A Hyundai/Kia design that moves the inertial sensor into the airbag control unit applies offset correction inside the sensor according to the vehicle set-up and keeps data in one-time-programmable memory; Kelsey-Hayes stores assembly and in-car offsets in the controller's non-volatile memory. GM's Saab 9-4x procedure shows the practical rule: a replacement multi-axis module is configured with the programming tool and the yaw sensor learned afterwards. Without that step, functions using module B stay unavailable.
- What you may notice
- Warning message appears directly after a repair
- Assistance or stability functions unavailable
- Likely causes
- LikelyModule B or its host control unit replaced without configuration
- PossibleVehicle variant or mounting position coded incorrectly
- RareCalibration data lost after software update
- 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.