Conditions for Running the DTC

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The engine is running for greater than 4 seconds.
The ignition 1 voltage is greater than 11 volts.
The above conditions are met for greater than 2 seconds.
DTCs P2454 and P2455 run continuously within the above enabling conditions.