Sensor-Ambient Air Temperature: Description
WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
The ambient temperature sensor is a variable resistor type sensor. it is mounted to the lower front fascia behind the radiator grille and in front of the engine compartment.
The ambient temperature sensor cannot be adjusted or repaired and, if inoperative or damaged, it must be replaced.