Conditions For Running DTC
WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- DTCs P0335, P0336, P0341 or P1345 are not set.
- The engine coolant temperature (ECT) is more than 149° F (65° C).