Conditions for Running the DTC: P046C

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.

DTCs P0401, P0402, P0403, P0642, or P0643 are not set.
The ECT sensor is warmer than 60°C (140°F).
DTC P046C runs continuously when the above conditions have been met.