Conditions for Running

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The engine coolant temperature (ECT) is more than 57° C (135° F).
The engine is running in Closed Loop Fuel Control.
The engine has been running for more than 160 seconds.
The battery voltage is between 9-18 volts.