Conditions for Setting the DTC
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 ECM detects at initial power-up, a temperature difference of greater than 20°C (36°F), exists between exhaust gas temperature sensors 1 and 2.
- This DTC runs once per key cycle when the above condition is met.