Because the part is constantly exposed to rushing air, full of pollutants such as dirt and exhaust fumes from other vehicles on bigger roads, it can become dirty, stopping it from functioning correctly. Over time the sensor will degrade and become increasingly prone to failure. The system measures how much energy is needed for the cold wire to feel the heat from the hot wire a value that is impacted by the amount of air flowing between the two wires, and thus it adjusts the air flow into the engine accordingly. The mass air flow sensor is relatively simple.
As the sensor picks up different information about air density, temperature and other variables, it ensures that the engine functions at the most efficient level. The sensor sends the information to the Engine Control Unit (ECU), which in turn delivers the correct amount of fuel to the engine.
It sits nicely between the air filter and the intake manifold, carefully measuring the amount of air that’s being drawn into the engine to drive the combustion.
The mass air flow sensor (MAF) is a critical component in your car’s fuel injection system.
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