Ambient Air Temp. Sensors
Several different systems in a car are affected by the temperature readings of the many temperature sensors. There are sensors to measure temperature in the coolant system, air intake system, engine, etc. The ambient air sensor measures the air temperature of the general area of the engine and its components. It is usually located outside of the engine block. It ensures that the whole system has reached optimal operating temperatures and that it does not exceed proper temperatures. Ambient air temp sensors are different from the mass air flow sensor, which is a part of the air intake and internal combustion systems. Most of the other air sensors in the car are used to take measurements that will affect how much fuel is injected into the engine or contributes to the calculations that the engine control unit uses for regulating engine performance. Ambient air sensors take a more general measurement.