Air Flow Meter/Sensor: Description and Operation

Mass Air Flow Sensor:

PURPOSE:
The Mass Air Flow (MAF) sensor measures the flow of air which passes through it in a given time. The ECM uses this information to monitor the operating condition of the engine for fuel delivery calculations.

OPERATION:
The MAF measures the electrical power required to maintain the sensing element at a specific number of degrees Celsius above the incoming air temperature. As the air enters the sample tube it passes over and cools the sensing element, which then requires additional current to maintain the prescribed uniform temperature.

LOCATION:
Top left hand side of engine, above throttle body.