Possible Causes
| Possible Causes |
|---|
| (K41) O2 1/1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE |
| (K902) O2 UPSTREAM RETURN CIRCUIT SHORTED TO BATTERY VOLTAGE |
| (K41) O2 1/1 SIGNAL CIRCUIT OPEN |
| (K902) O2 UPSTREAM RETURN CIRCUIT OPEN |
| O2 SENSOR |
| PCM |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .