Conditions for Setting the DTC
WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
P040C
- The ECM detects that the EGR sensor is colder than 800°C (1472°F).
- The condition exists for greater than 1 second.
P040D
- The ECM detects that the exhaust temperature sensor is warmer than 100°C (212°F).
- The condition exists for greater than 1 second.