Conditions for Running the DTC
WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
P0403
- The engine is running.
- The EGR is not actively being controlled.
- DTC P0403 runs continuously.
OR
- The engine is running.
- The EGR valve is actively being controlled.
- The ECT is greater than 60°C (140°F).
- DTC P0403 runs continuously.
P046C
- DTCs P0401, P0402, P0403, P0642, or P0643 are not set.
- The ECT sensor is greater than 60°C (140°F).
- DTC P046C runs continuously when the above conditions have been met.