Conditions for Running the DTC

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

The ignition is OFF for more than 10 hours.
The ECT Sensor parameter minus the IAT Sensor parameter is less than 8°C (14°F) at engine start-up.
The ECT Sensor parameter is between -30 and +45°C (-22 and +133°F) at engine start-up.
The system voltage is between 9-18 volts.
This diagnostic runs one time per valid cold start once the above conditions are met.