The function of the intake air temperature sensor, the position of the intake air temperature sensor

The intake air temperature sensor is actually a negative temperature coefficient thermistor. Its function is to transmit the intake air temperature to the ECU in the form of a voltage signal, and the ECU can be used as a correction signal for fuel injection and ignition.

Location of intake air temperature sensor

The intake air temperature sensor is generally installed in the intake pipe or the air flow meter.

As a negative temperature coefficient thermistor, the intake air temperature sensor can sense the temperature of the intake air flow. When the intake air temperature increases, the resistance value decreases, and when the intake air temperature decreases, the resistance value increases. The change of the resistance in the air temperature sensor circuit causes the voltage fluctuation, which generates a different voltage signal. The ECU calculates the actual temperature of the intake air flow through the voltage signal and thus corrects the engine fuel injection and ignition. .

Symptoms of damaged intake air temperature sensor

When the engine intake air temperature sensor is damaged, the ECU will not only be unable to accurately use it as a correction signal for fuel injection and ignition, but will even transmit wrong information to the ECU, which will cause difficulty in starting the engine, unstable idle speed and pollution of exhaust emissions. Exacerbate other problems.