Conditions for Setting the DTC: P0117
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects that the ECT is greater than 140°C (284°F) for greater than 4 seconds or a cumulative of 50 seconds.