Sensor, Ambient Temperature: Description
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The ambient air temperature sensor is a variable resistor that monitors the air temperature outside of the vehicle. The Automatic Temperature Control (ATC) uses the ambient air temperature sensor data to help maintain optimum passenger compartment temperature levels. The ambient air temperature sensor is mounted behind the front fascia.