Conditions for Running the DTC: P0403
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.
- The engine is running.
- The EGR is not actively being controlled.
- The ECT is colder than 60°C (140°F).
- DTC P0403 runs continuously when the above conditions have been met.
OR
- The engine is running.
- The EGR valve is actively being controlled.
- The ECT is warmer than 60°C (140°F).
- DTC P0403 runs continuously when the above conditions have been met.