How to Change the Mass Air Flow Sensor in a 2002 Pontiac Grand Prix

The Grand Prix was the flagship of the Pontiac line in the 2002 model year. Buyers could opt for a 3.1-liter or 3.8-liter V-6 engine. Both engines rely on General Motors electronic fuel injection system for fuel delivery. To provide the right amount of fuel for the proper air-to-fuel ratio, the Grand Prix's computer employs a mass air flow sensor to provide real-time air flow metering information. If the MAF sensor is contaminated or it short-circuits the Grand Prix's fuel economy and engine performance will suffer.

Instructions

1

Shut the Grand Prix's engine off and open the hood. Locate the mass air flow sensor in the air inlet tubing between the air cleaner assembly and the top of the engine.

2

Unplug the wiring connector from the top of the MAF sensor. Loosen the clamps holding the inlet and outlet tubes to the sensor using a screwdriver.

3

Pull the inlet tube off the front of the MAF sensor. Pull the MAF sensor off the outlet tube and set it aside.

4

Connect the new MAF sensor to the outlet tube, making sure the tube and sensor mate so there's no air loss at the union. Slide the inlet tube onto the new MAF sensor, once again inspecting the seal to make sure there are no air leaks.

5

Tighten the clamps using a screwdriver. Plug the wiring connector into the new MAF sensor. Close the Grand Prix's hood.