In the latest cars, a hot-wire-based mass airflow sensor also has an intake air temperature sensor (IAT) installed in the MAF sensor that measures the temperature of the air passing through the engine. Related Post: The Risks Of Driving With Mass Air Flow Sensor Unplugged Intake Air Temperature Sensor Integrated Into Mass Air Flow Sensor The vane-type airflow sensor measures the volume of the air entering the engine by a spring-loaded mechanical flap.

Two types of mass airflow sensors are used in cars, a vane meter, and a hot wire. The MAF sensor works together with the oxygen sensor and determines a precise air-fuel quantity. There is an air-to-fuel ratio for perfect combustion in a car engine called stoichiometric ratio, which is 14.7:1, which means for every 1 gram of fuel 14.7 grams of air is required, in which all the fuel is burned with no excess air.ĭetermining this exact amount of air for the perfect combustion is the job of the mass air flow sensor, where the ECU exactly knows how much air has entered the cylinder so that it lets the fuel enter the cylinder proportionally.

This output voltage value is proportional to the incoming air.Īs we know that air is necessary with fuel for combustion in the engine cylinder. Here mass means quantity, as its name defines a mass air flow sensor means a sensor that measures the Quantity Of Air flowing to the engine and then converts it into a voltage value. Mass Air Flow sensor also called MAF sensor is an electronic sensor, which measures the quantity of air going to the engine in a fuel-injected internal combustion engine. Frequently Asked Questions (FAQs) What Is Mass Air Flow Sensor What Is Mass Air Flow Sensor.

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