C0527Steering Angle Sensor Module Mechanical
- Generic OBD-II code · Chassis
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- C0527 marks a mechanical rather than electrical fault of the steering angle sensor module. No manufacturer documents this code publicly. Many sensors are gear-driven: Bosch and Saab describe a hub gear on the steering shaft turning two measuring gears with different tooth counts (28 and 26 on the Saab 9-5), whose magnet positions encode the absolute angle. Broken teeth, a cracked housing, a worn drive dog or a sensor clipped in out of position make the reported angle stop following the wheel although supply and bus are fine. Bourns' contactless type checks its own angular speed and reports an error beyond 1016°/s, which a jumping gear would cause. Stability control is usually switched off; the cure is a new sensor and re-centring.
- What you may notice
- ESC warning lamp on
- Angle on the scan tool jumps or stops changing while steering
- Possible noise from the steering column
- Likely causes
- LikelyWorn or broken measuring gears inside the sensor
- PossibleSensor drive dog or mounting loose on the steering shaft
- PossibleSensor installed out of position after column or clock spring work
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.