C1278 Code: Meaning, Causes, and Symptoms | OBD2 Codes
C1278 – Steering Wheel Angle 1 And 2 Signal Faulted
C1278 Possible Symptoms
Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)
C1278 Possible Causes
Faulty Steering Wheel Angle Sensor,Steering Wheel Angle Sensor harness is open or shorted,Steering Wheel Angle Sensor circuit poor electrical connection
The steering wheel rotation (in degrees) is sent to the Anti-Lock Brake System (ABS) module. Voltage is supplied to the steering wheel angle sensor from the ABS module and ground is provided by the ABS module. The steering wheel rotation sensor monitor the steering wheel position when the slotted wheel in the clockspring assembly rotates through the infrared light generated by the sensor.