Hi Customer (name blocked for privacy),

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The mass air flow (MAF) sensor is an air flow meter that measures the flow rate and density of the air entering the engine. The MAF sensor receives power and ground from circuits not supplied by the control module. The control module does apply a voltage to the sensor on the signal circuit. The sensor uses the voltage to produce a frequency based on inlet air flow through the sensor. A low air flow rate (such as engine idle) causes the MAF sensor to produce a low frequency signal. A high air flow rate (such as wide open throttle, or high load) causes the MAF sensor to produce a high frequency signal.

The PCM uses the MAF sensor signal to provide the correct fuel delivery for a wide range of engine speeds and loads. If the PCM detects a signal frequency lower than the possible range of a normally operating MAF sensor, DTC P0102 will set.

You will need to do a couple of voltage checks do you have access to a voltmeter?

Unplug the MAF connector. Check for Ignition Voltage on Ignition feed (pinD), if not 12v check Ign1 fuse, If 12v found pin(d), place meter ground lead on PIN(c) and pos meter lead PIN(D) if not 12v check for bad ground. PIN (E) check for voltage from PCM should be 5v.

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Let Me know what you find

Scott