Conditions for Running the DTC

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The engine is running for more than one second.
The ignition 1 signal is more than 8 volts.
The above conditions are met for more than one second.
These DTCs run continuously when the above conditions are met.