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Home >> Ford >> 2009 >> Focus L4-2.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Air Flow Meter/Sensor >> Description and Operation >> Electronic Engine Controls

Electronic Engine Controls

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Electronic Engine Controls

The MAF sensor:

- uses a hot wire sensing element to measure the amount of air entering the engine.
- uses a second hot wire to measure intake air temperature.
- 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.