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What is a MAS sensor on vw polo 1.4.?

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What is a MAS sensor on vw polo 1.4.?

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  1. A MAF sensor is Mass Air Flow.

    A mass airflow sensor is used to find out the mass of air entering an fuel-injected engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine. Air changes its density as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the ambient temperature and altitude, and this is an ideal application for a mass sensor.

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