2000 Chevrolet Blazer - Ambient Air Temperature Sensor

Ambient Air Temperature Sensor Replacement

The ambient air temperature sensor, or outside air temperature sensor, measures the temperature of the air outside of a vehicle. This sensor is commonly located behind the grille or elsewhere on the front of the vehicle in a position that allows it to sense the temperature of the surrounding air. An ambient air temperature sensor converts changes in temperature into electrical signals to be interpreted by the vehicle's computer, and the outside temperature is often displayed on the dash or overhead display. These signals may also be used to adjust engine performance to ensure absolute peak efficiency in varying weather conditions. Due to the heat from your engine, the road, or sunlight, it is normal for the sensor to be a few degrees off. However, if the readings are consistently inaccurate, you may need a replacement ambient air temperature sensor. Some common signs of a faulty sensor include inaccurate temperature readings, issues with the climate control system, and reduced engine performance. An open or shorted circuit or damaged wiring connector can cause the sensor to read at its lowest or highest temperature, either around forty below zero or up to around 120 degrees Fahrenheit on many vehicles. If you need a replacement, shop O'Reilly Auto Parts, where we carry new ambient air temperature sensors for most vehicles.