Conditions for Setting the DTC: P0112
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects that the intake air temperature is greater than 132°C (270°F) for greater than 4 seconds or a cumulative of 30 seconds, 1 second or for a cumulative 10 seconds for LLT.