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 stuck exhaust differential pressure sensor will cause this DTC to set.
- The flexible part of the exhaust differential pressure lines are made of a high temperature hose that is protected by a braided covering. If the hoses are twisted or bent, they will not return to their normal size and shape. If the hoses are restricted, it may cause this DTC to set.
- A turbocharger charge air cooler (CAC) hoses leak may cause this DTC to set.
- An air induction air leak or a skewed mass air flow (MAF) sensor may cause this DTC to set.
- An engine stall, low engine idle speed, or an engine misfire may cause this DTC to set.