Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0047, P0048, P2564, or P2565 are not set.
The engine has been running for greater than 30 seconds.
DTC P2563 runs continuously when the above conditions are met.