Code No. U0401: Engine CAN Message: 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 2.
2. NO: Repair the CAN bus lines (Refer to DIAGNOSIS ).
STEP 2. Scan tool (M.U.T.-III) DTC.
Check the engine DTC (Refer to TROUBLESHOOTING < 2.4 L Engine >, DIAGNOSTIC TROUBLE CODE CHART < 3. 0 L Engine >).

Q: Is the DTC stored?
1. YES: Perform the relevant troubleshooting.
2. NO: Go to Step 3.
STEP 3. Scan tool (M.U.T.-III) data list.
Check the following data list (Refer to DATA LIST REFERENCE TABLE ).
- Item No.12: Engine speed
Q: Is the check result normal?
1. YES: Intermittent malfunction (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
2. NO: Go to Step 4.
STEP 4. Check whether the DTC is stored again.
Q: Is DTC No. U0401 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. U0401 stored?
1. YES: Return to Step 1.
2. NO: This diagnosis is complete.