Possible Causes
| Possible Causes |
|---|
| EXHAUST LEAK |
| (K243) O2 2/2 SIGNAL CIRCUIT |
| (K904) O2 RETURN DOWNSTREAM CIRCUIT |
| O2 SENSOR |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE ).