Diagnostic Aids
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- A skewed or shifted exhaust differential pressure sensor will cause inaccuracies in the soot model and may cause this DTC to set.
- Improperly installed or loose exhaust gas temperature (EGT) sensors will cause inaccuracies in the soot model and cause this DTC to set.
- Low engine compression may cause this DTC to set.
- Corroded fuel injectors will have an inability to properly control regeneration temperatures and may cause this DTC to set.
- Water in the fuel system will lower the energy of the fuel. Emulsified fuel will lower regeneration temperatures that may cause this DTC to set.
- Operate the vehicle at slower speeds or stop and go conditions will lower regeneration temperatures. Low regeneration temperatures will not properly clean the DPF and may cause this DTC to set.
- Extended operation of the vehicle with the Clean Exhaust Filter message may cause this DTC to set.