Conditions For Running DTC

WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, 2002 Chevrolet Monte Carlo, and 2002 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

The engine is running.
The Idle Air Control (IAC) position is more than 2 counts.
The ignition 1 signal is more than 8 volts.
The above conditions are met for more than 0.5 second.