What does it mean?
C1219 is a Chassis (ABS, traction control, steering) fault code. It indicates: Steering Angle Sensor Erratic Performance .
Symptoms
- Stability control and ABS lamps on, often with a message that the stability system is off
- Stability control cutting in briefly on a straight, dry road for no obvious reason
- Steering wheel appears straight but the scan tool shows an angle well away from zero
- Fault appearing right after alignment, suspension work or steering wheel removal
- Adaptive headlights, lane assist and other steering-linked functions become inactive
- Warning that comes and goes as the wheel is turned to a particular position
Likely causes
- Sensor calibration lost after a battery disconnect, wheel alignment, steering rack or column repair
- Worn or dirty sensor disc inside the unit, giving skipped counts as the wheel is turned
- Broken conductor or fatigued track in the clock spring that carries the sensor signal
- Loose sensor mounting on the column, letting the sensor body move with the wheel
- Corroded connector behind the steering wheel or under the column shroud
- Play in the steering intermediate shaft or coupling, so the measured angle does not match the road wheels
- Low system voltage or a poor module ground disturbing the sensor supply
How to fix it
- Read the live steering angle with the wheel held straight and the vehicle on level ground; it should sit close to zero
- Turn the wheel slowly lock to lock while graphing the angle and look for steps, dropouts or sudden jumps
- Confirm the steering wheel is centred and the alignment is correct before touching the sensor
- Inspect the clock spring connector and wiring under the shroud, and check the sensor is tight on the column
- Check for network communication faults and for low voltage or a bad ground at the module
- Carry out the sensor zero point calibration with the correct procedure and repeat the road test
- Replace the sensor, or the clock spring assembly where the two are combined, if the signal still jumps