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 IAT Sensor 1 parameter is warmer than 148°C (299°F) for greater than 1 second. This is equal to or less than 0.10V on the IAT signal circuit as measured by the ECM.