Theory Of Operation
WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
The Inlet Air Temperature Sensor and the Inlet Air Pressure Sensor are combined in one sensor and are located in the top of the air cleaner box. The Inlet Air Temperature Sensor is used to measure the temperature of the air entering the intake system. The Powertrain Control Module (PCM) provides a 5-Volt supply and sensor ground for the Inlet Air Temperature Sensor. The Inlet Air Temperature Sensor provides a signal back to the PCM on the Inlet Air Temperature Sensor Signal circuit. If this fault becomes active the PCM will light the MIL light.