Conditions For Setting 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 run time is over 5 minutes to achieve Closed Loop temperature of 14°F (-10°C).
The calibrated amount air flow has been exceeded.
The maximum idle time has been less than 4 minutes.