DTC C121A: Steering Wheel Sensor System (Neutral Learning Abnormality): Notes

CAUTION:

If there is any problem in the CAN bus lines, an incorrect DTC may be set. Prior to this diagnosis, diagnose the CAN bus lines.
Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
When the steering wheel sensor is replaced, calibrate the steering wheel sensor (Refer to ON-VEHICLE SERVICE ), and reset the STEERING WHEEL SENSOR CORRECTION AMOUNT SET IN THE AWC-ECU (ITEM NO. 1: STEERING ANGLE ADJUSTED VALUE ).