What does it mean?
C1267 is a Chassis (ABS, traction control, steering) fault code. It indicates: Steering Angle Sensor Signal Coherence . This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.
Symptoms
- Stability and traction lamps on with the systems inhibited
- Occasional unwanted brake intervention, or intervention that never comes when it should
- Warning tends to appear after cornering or on winding roads rather than on start-up
- Steering angle does not settle at zero when the vehicle is driving straight
- Vehicle may pull or feel unsettled if the underlying cause is mechanical
Likely causes
- Steering angle sensor out of calibration so its value no longer agrees with yaw rate and wheel speed data
- Faulty yaw rate or lateral acceleration sensor supplying a conflicting reference
- Mismatched tyre sizes, a space-saver spare or badly worn tyres distorting the wheel speed comparison
- Worn steering and suspension parts or poor alignment so the car does not follow the commanded angle
- Intermittent clockspring or sensor fault producing values that look plausible but are wrong
- Delayed or corrupted CAN messages between the chassis modules
- Sensor drift with age
How to fix it
- On a straight, level road compare steering angle, yaw rate, lateral acceleration and all four wheel speeds in live data
- Check tyre sizes, brands, pressures and wear across all four corners before any electrical work
- Inspect steering linkage and suspension for play, then check the wheel alignment
- Run the steering angle calibration and the yaw and lateral sensor zero routines in the sequence the manufacturer specifies
- Wiggle test the sensor and clockspring circuits while watching live data for glitches
- Check the CAN network between chassis modules for errors and voltage faults
- Replace whichever sensor is proven by live data to be reporting incorrectly