Set Condition
WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
The Powertrain Control Module (PCM) compares the Charge Air Cooler (CAC) Temperature readings to a calibrated threshold. The calibrated threshold varies, and is dependent on the reading from the Ambient Air Temperature (AAT) Sensor. If the rationalized value is above a calibrated threshold for a cumulative total (during a calibrated amount of time), the PCM determines that the Charge Air Cooler is inefficient and sets the DTC.