Location of mass air flow sensor, 2000 Grand Prix GTP

Start with checking/replacing the air filter. Clean the inside of the throttle body and mass air flow sensor. Use a tooth brush on the throttle, just spray down the sensor. Brake clean works. If it still acts up. Replace the plugs and wires. I recommend the fuel filter also.

I would replace the TPS sensor. If you have fuel pressure enough to start the car, then you probably have pressure always. Before turning the key to start, turn to ON. You should hear the fuel pump pressurizing the lines. Turn the car back off. Go under the hood and remove the cap to the Schrader Valve. Use a rag to catch any fuel when you depress the valve stem. If fuel comes out into your rag, you should have pressure. Try this a second time to be sure. I had this issue with my car shutting down. TPS sensor replacement fixed it. BUT...it could be vacuum lines, or another sensor fault. The TPS is a common issue. You may also want to clean your Mass Air Flow sensor with the proper solvent and technique.

mass air flow sensor is located in the air intake tube between the air filter and the throttle body

Check the mass air flow sensor for damage or for loose wire connection.

They are two different part numbers.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Try replacing the cam.sensor.

u don't replace the whole sensor just the actual heated wire part, that is held in place by two star screws, see picture.
A-1 CARDONE Part # 7450015 {[Mass Airflow Sensor] Reman.} $142.00

P0102 Mass or Volume Air Flow Circuit Low Input.
The actual Mass air Flow sensor is damaged. replace this sensor asap. it is located on the top of the throttle body.

I take it you mean the Mass air flow sensor. It's in the rubber flex tube that comes from your air filter to your intake.

If you have a GTP these engines use a hi output fuel pump. they use a fuel pump resistor located under the battery tray (look up from under the car) This resistor lowers the voltage to the fuel fump when not in boost mode. because of its locatoin it is prone to corrosion. if you bypass the wires and the engine starts and stays running replace the resistor