Possible Causes
| Possible Causes |
|---|
| EXHAUST LEAK |
| O2 SENSOR 2/2 SIGNAL CIRCUIT |
| O2 SENSOR 2/2 RETURN CIRCUIT |
| O2 SENSOR 2/2 |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to: PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .