Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2008 Pontiac Grand Prix V6-3.8LFACTORY OEM SERVICE PROCEDURE
Air Flow Meter/Sensor: Service and Repair
Mass Airflow Sensor/Intake Air Temperature Sensor Replacement
Removal Procedure
1. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (Service and Repair) .
Important: The intake air temperature (IAT) sensor and the mass air flow (MAF) sensor are combined as one sensor.
2. Disconnect the MAF/IAT sensor electrical connector (2).
3. Loosen the air cleaner intake duct clamps.
4. Remove the air cleaner intake duct from the air cleaner housing cover and the throttle body assembly.
5. Remove the MAF/IAT sensor from the air cleaner intake duct.
Installation Procedure
1. Install the MAF/IAT sensor to the air cleaner intake duct.
2. Install the air cleaner intake duct to the air cleaner housing cover and the throttle body assembly.
Notice: Refer to Fastener Notice (Fastener Notice) .
3. Tighten the air cleaner intake duct clamp screws.
Tighten the duct clamps to 3 N.m (27 lb in).
4. Connect the MAF/IAT sensor electrical connector.
5. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (Service and Repair) .
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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