Diagnostic Aids

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Any changes to the induction system or exhaust system, such as the installation of aftermarket parts, may cause this DTC to set.
If the condition is intermittent, refer to Intermittent Conditions .