Conditions for Running the DTC

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The engine is cranking or running.
The camshaft position (CMP) sensor signal is present.
DTC P0335 runs continuously when the above conditions are met.
DTCs P0642 or P0643 are not set.