Possible Causes
WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| EXHAUST LEAK |
| (K243) O2 2/2 SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| (K904) O2 RETURN (DOWN) CIRCUIT SHORTED TO VOLTAGE |
| (K243) O2 2/2 SIGNAL CIRCUIT SHORTED TO GROUND |
| (K904) O2 RETURN (DOWN) CIRCUIT SHORTED TO GROUND |
| (K243) O2 2/2 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
| (K904) O2 RETURN (DOWN) CIRCUIT OPEN OR HIGH RESISTANCE |
| 2/2 OXYGEN SENSOR |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .