A change in air temperature causes the air density to change and this affects the amount of fuel required for the correct air-fuel ratio. The Air Temperature Sensor monitors the air temperature and sends a signal back to the ECU.
Air Temperature Sensors are otherwise known as:
-Intake Air Temperature Sensors.
![](https://cambiare-ve.com/wp-content/uploads/2012/12/Air-Temp-Sr-300x300.png)