Possible Causes
| Possible Causes |
|---|
| (K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE |
| (K902) O2 DOWNSTREAM RETURN CIRCUIT SHORTED TO BATTERY VOLTAGE |
| (K141) O2 1/2 SENSOR SIGNAL CIRCUIT OPEN |
| (K902) O2 DOWNSTREAM RETURN CIRCUIT OPEN |
| O2 SENSOR |
| PCM |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .