Set Condition
WARNING: This page is about a different car, the 2016 RAM 3500 HD and 2016 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The datalink message from the Drivers Door Module (DDM) to the Powertrain Control Module (PCM) indicates that the Ambient Air Temperature (AAT) Signal circuit has fallen below a calibrated threshold for a certain period of time.