Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0120, P0220, P1125, P1514, P1515, P1516, P1518, P2108, P2120, P2121, P2125, P2126, P2130, P2131, P2135 are not set.
The engine has been running for a length of time that is determined by the start-up coolant temperature. The length of time ranges from 4 minutes at less than -30°C (-22°F) to 30 seconds at more than 30°C (86°F).
The throttle angle is less than 1 percent when the engine speed is less than 1,200 RPM.
Or
The throttle angle is less than 20 percent when the engine speed is more than 1,200 RPM.