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 has been running for more than 60 seconds.
OR
The engine run time is less than 60 seconds when the intake air temperature (IAT) is more than 0°C (32°F)