Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0121, P0122, or P0123 are not set
The engine is running.
The throttle angle is more than 0 percent, if the engine speed is less than 1,000 RPM.