Conditions for Running the DTC
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- DTC P0335, P0336, P0641 or P0651 is not set.
- The engine is cranking or running.
- DTC P0340 runs continuously when the above conditions are met.