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 P0601, P0602, P0604, P0606, P1516, P2101, P2108, U0107 are not set.
DTCs P0120, P0220, and P2135 are not set at the same time or DTCs P0120 and P0220 are not set at the same time.
The engine operates longer than 1 second.
The engine speed is more than 500 RPM.