Basic

Mass Air Flow Sensor with integrated Intake Air Temperature Sensor
The mass airflow sensor informs the ECM of the rate or airflow entering the engine by producing a voltage, which increases as the rate of air flow increases. The MAF sensor also takes into account the density of air entering the engine so it is possible to maintain the required air to fuel ratio, and compensate for variations in atmospheric pressure and temperatures. The integral IAT sensor measures the temperature of the air entering the intake system. The ECM uses this information to compensate for higher then normal air intake temperatures upon combustion detonation.