Conditions for Setting the DTC

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The engine coolant temperature failed to reach at least 70°C (159°F).
OR
The difference between the actual ECT temperature and the estimated coolant temperature is 10°C (18°F) or more.
The above conditions exist when the engine has been operating for 20 minutes or less depending on the engine load.