Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The engine has been running for a length of time that is determined by startup coolant temperature. The length of time ranges from 4 minutes at less than -30°C (-22°F) to 10 seconds at more than 30°C (86°F).
DTCs P0068, P0120, P0220, P1125, P1516, P2101, P2108, P2120, P2121, P2125, P2135 are not set.
The throttle angle is less than 1 percent when the engine speed is less than 1,200 RPM.
OR
The throttle angle is more than 20 percent when the engine speed is more than 1,200 RPM.