Pontiac Repair: 02 Pontiac Grand Prix code p0102, powertrain control module pcm, powertrain control module

Question
I am trying to find out what exactly the diagnostic code p0102 is.  The only explination I can find is "Mass air flow."  Does anyone know what this means?  Much Appreciated.

Answer
Hi
P0102 is a Mass Air Flow Sensor code.
Here is the DTC description:
The mass air flow (MAF) sensor is an air flow meter that measures the amount of air entering the engine. The powertrain control module (PCM) uses the MAF sensor signal in order to provide the correct fuel delivery for a wide range of engine speeds and loads. A small quantity of air entering the engine indicates deceleration or idle. A large quantity of air entering the engine indicates an acceleration or high load situation. The MAF sensor has an ignition 1 voltage circuit, a ground circuit and a signal circuit. The PCM applies a voltage to the sensor on the signal circuit. The sensor uses the voltage in order to produce a frequency based on inlet air flow through the sensor bore. The frequency will vary within a range of around 2,000 hertz at idle to about 10,000 hertz at maximum engine load. DTC P0102 will set if the PCM detects a frequency signal lower than the possible range of a normally operating MAF sensor.

USUALLY, with this code IF you have the 3.8L (3800) engine you should check the wire harness going to the MAF.
The harnesses have a tendency to open inside the insulation on those particulae engines.
I would replace the sensor AND get a pigtail harness from the dealership and splice it in also.
I Hope this helps.
JUST ADVICE from experience.
Good Luck
Pawl