Conditions For Setting DTC

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

PCM detects that:

The calibrated amount of engine run time has been met.
The calibrated amount of engine air flow has been met.
The calibrated vehicle speed and distance have been met.
The calibrated ECT of 158°F (70°C) has not been met.