Conditions for Setting the DTC: P0118
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects that the ECT is colder than -60°C (-76°F) for greater than 5 s.