Focus L4-2.0L (2009)
Air Flow Meter/Sensor: Description and Operation
Electronic Engine Controls
Electronic Engine Controls
The MAF sensor:
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uses a hot wire sensing element to measure the amount of air entering the engine.
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uses a second hot wire to measure intake air temperature.
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sends signals to the PCM. The PCM will then calculate the required fuel injector pulse width in order to provide the desired air/fuel ratio.
