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) heating and A/C system uses the ambient air temperature sensor data to help maintain optimum passenger compartment temperature levels. The ambient air temperature sensor is mounted behind the grille on the left side.