Possible Causes
WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| AIR FILTER |
| (K103) O2 SENSOR 1/1 PUMP CELL CURRENT TRIM CIRCUIT OPEN/HIGH RESISTANCE |
| MASS AIR FLOW SENSOR |
| ENGINE MISFIRE |
| INTAKE AIR SYSTEM LEAK |
| EXHAUST SYSTEM LEAK |
| EGR SYSTEM LEAK |
| O2 SENSOR 1/1 |
| 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 the (special tool #8197A, Electric Terminal Tool Kit).