Diagnostic Aids
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 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.
- Not operating the vehicle under the proper conditions to perform a full and effective regeneration OR ignoring the Clean Exhaust Filter message may cause this DTC to set.