Possible Causes
WARNING: This page is about a different car, the 2007 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| (K299) O2 1/2 HEATER CONTROL CIRCUIT OPEN |
| (Z904) O2 1/2 HEATER GROUND CIRCUIT OPEN |
| (K299) O2 SENSOR 1/2 HEATER CONTROL SHORTED TO BATTERY VOLTAGE |
| O2 SENSOR |
| PCM |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .