Conditions for Running the DTC
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.
The engine run time is more than 10 seconds.
OR
The engine run time is less than 10 seconds when the intake air temperature (IAT) is less than 50°C (122°F).