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Home >> Audi >> 2001 >> S4 Quattro, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Mass Airflow Sensor
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Mass Airflow Sensor

As a result of the fully adaptive oxygen sensor control, the CO adjustment potentiometer has been eliminated. A hot wire air mass sensor is used to measure airflow into engine. The sensor housing includes a baffle which reduces air turbulence and pulses. The sensor signal is used to calculate injection quantity, ignition timing and fuel tank ventilation.