The Air charge temperature (ACT) sensor also known as the Manifold air temperature (MAT) sensor, calculates the air temperature accessing the engine.
Air charge temperature sensor operationThe Air charge temperature is vital because it computes the air temperature going into the engine and transmits the information to the vehicle's powertrain control module. The PCM takes in the information and utilizes it to calculate air density so it can balance the air/fuel ratio. It is vital to have this information because hot air is known to be less dense than cold air, the sensor ensures that the air entering the engine is ideal for the vehicle's performance to be at its best.
Common issues with a faulty Air Charge Temperature sensorA faulty Air Charge Temperature sensor can lead to poor fuel efficiency, engine misfires, and a decline in engine performance.