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 |
|---|
| MASS AIR FLOW SENSOR |
| O2 SENSORS |
| USE OF HIGH SULFUR FUEL |
| TAMPERING OR REMOVAL OF THE NAC |
| DEGRADED OR POISONED NAC |
| EXHAUST, EGR OR INTAKE LEAKS |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE - 6.7L .