Possible Causes
WARNING: This page is about a different car, the 2012 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| (K733) O2 SENSOR 1/2 PUMP CELL CURRENT TRIM CIRCUIT OPEN/HIGH RESISTANCE |
| (K734) O2 SENSOR 1/2 POSITIVE CURRENT CONTROL CIRCUIT OPEN/HIGH RESISTANCE |
| (K141) O2 SENSOR 1/2 SIGNAL CIRCUIT OPEN/HIGH RESISTANCE |
| (K904) O2 SENSOR 1/2 RETURN CIRCUIT OPEN/HIGH RESISTANCE |
| AIR FILTER SYSTEM |
| EXCESSIVE FUEL ENTERING THE AFTERTREATMENT/EXHAUST SYSTEM |
| MASS AIR FLOW SENSOR |
| ENGINE MISFIRE |
| FUEL DELIVERY SYSTEM FAILURE |
| INTAKE AIR SYSTEM LEAK |
| EXHAUST SYSTEM LEAK |
| EGR SYSTEM LEAK |
| O2 SENSOR 1/2 |
| O2 SENSOR MODULE |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE - 6.7L .
NOTE:
Before replacing O2 Sensor or O2 Sensor Module, check aftertreatment wiring harness for spread terminals. For wiring harness checking procedure, DO NOT back probe, use Electric Terminal Tool Kit (special tool #8197A, Electric Terminal Tool Kit).