What does it mean?
C1280 is a Chassis (ABS, traction control, steering) fault code. It indicates: Yaw Rate Sensor In SAS Control Module Is Signal Error .
Symptoms
- Stability and traction lamps on with ESP disabled
- Unexpected braking or steering correction while cornering
- Yaw rate value stuck, drifting or not returning to zero when the vehicle is stationary
- ABS warning lamp often lit at the same time
- Steering angle and yaw data clearly disagree on the scan tool
Likely causes
- Internal fault of the yaw rate element built into the steering angle sensor control module
- Zero point lost after a battery disconnection, module reset or accident repair
- Module mounting loose so vibration corrupts the yaw signal
- Poor power supply or ground at the control module
- Corroded connector or damaged harness at the module
- CAN communication errors so the yaw message is received incorrectly
- Water intrusion at the module location, often after a leak into the cabin
How to fix it
- With the vehicle stationary and level, read the yaw rate value; it should sit at or very close to zero
- Check the module mounting bolts and inspect the area for water ingress
- Measure module supply voltage and ground with a voltage drop test
- Check the CAN circuits at the module for correct resistance and signal quality
- Perform the zero point and steering angle calibration after any battery or module work
- Road test and confirm the yaw value tracks the direction and rate of a steady turn
- Replace and calibrate the control module when the internal sensor stays faulty