Code No. C121A: Steering Wheel Sensor Initialization: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Scan tool (M.U.T.-III) CAN bus diagnostics.
Use scan tool (M.U.T.-III) to perform the CAN bus diagnosis.

Q: Is the check result normal?
1. YES: Go to Step 3.
2. NO: Repair the CAN bus lines (Refer to DIAGNOSIS ). After repairing the CAN bus line, go to Step 2.
STEP 2. Check whether the DTC is stored again.
Q: Is DTC No. C121A stored?
1. YES: Go to Step 3.
2. NO: This diagnosis is complete.
STEP 3. Steering wheel sensor calibration.
Perform calibration of the steering wheel sensor (Refer to STEERING WHEEL SENSOR CALIBRATION ).

Q: Has the calibration succeeded?
1. YES: Go to Step 4.
2. NO: Replace the steering wheel sensor (Refer to STEERING WHEEL SENSOR ). Then, go to Step 4.
STEP 4. Check whether the DTC is stored again.
Q: Is DTC No. C121A stored?
1. YES: Replace the AWD-ECU (Refer to AWD-ECU ). Then, go to Step 5.
2. NO: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
STEP 5. Check whether the DTC is stored again.
Q: Is DTC No. C121A stored?
1. YES: Return to Step 1.
2. NO: This diagnosis is complete.