Code No. P0140: Oxygen Sensor (rear) Circuit No Activity Detected




OPERATION




FUNCTION




TROUBLE JUDGMENT


Check Conditions
Judgement Criterion
or


FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III data list



  • Data list reference table (Refer to ).

  1. Item AD: Oxygen sensor (rear)

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 2.

STEP 2. Replace the oxygen sensor (rear)



  • After replacing the oxygen sensor (rear), reconfirm whether the diagnosis code is set.

Q. Is the diagnosis code set?

Check oxygen sensor (rear) system. Check Code No. P0137: oxygen sensor (rear) circuit low voltage (Refer to ). Check Code No. P0138: oxygen sensor (rear) circuit high voltage (Refer to ).
Check end.