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.

Engine is running for 30 seconds.
The ESCM has turned ON and no configuration DTC is present.
This diagnostic shall run every 100 milliseconds.
Reference voltage is stable and accurate.