Conditions for Running the DTC

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

DTCs P0606, P1518, P2108 are not set.
The ignition is ON.
The communications between the throttle actuator control (TAC) module and the powertrain control module (PCM) must be valid.