Possible Causes
WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| EXHAUST LEAK |
| (K43) O2 2/1 SIGNAL CIRCUIT |
| (K902) O2 RETURN UPSTREAM CIRCUIT |
| O2 SENSOR |
Always perform PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.