Conditions for Setting 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.
- The ECM detects a temperature difference greater than 20°C (68°F) between exhaust temperature sensors - positions 1 and 2.
- This DTC runs once per key cycle when the above condition is met.