Conditions for Running the DTC (With 6.0L or 6.2L)

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.

DTC P0335, P0336, P0340, P0341, P0641, or P0651 is not set.
The engine is running.
The engine speed is less than 2,000 RPM.
The CMP actuator is commanded to the parked position.
DTC P0016 runs continuously when the above conditions are met.