Conditions for Setting the DTC: P0112
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects that the IAT sensor parameter is warmer than 150°C (302°F) for greater than 6.3 seconds.