Possible Causes
| Possible Causes |
|---|
| EXHAUST LEAK |
| (K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| (K904) O2 RETURN (DOWN) CIRCUIT SHORTED TO VOLTAGE |
| (K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO GROUND |
| (K904) O2 RETURN (DOWN) CIRCUIT SHORTED TO GROUND |
| EXCESSIVE RESISTANCE IN THE (K141) O2 1/2 SIGNAL CIRCUIT |
| EXCESSIVE RESISTANCE IN THE (K904) O2 RETURN (DOWN) CIRCUIT |
| 1/2 OXYGEN SENSOR |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .