GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2003 🢒 Grand Prix 🢒 Engine 🢒 Engine Controls - 3.1L 🢒 Mass Airflow Sensor Replacement

Removal Procedure
  1. Remove the PCV valve tube (4) from the air cleaner intake duct.
  2. Disconnect the intake air temperature (IAT) sensor electrical connector (3).

    3. Object Number: 811623 Size: SH
  3. Disconnect the mass air flow (MAF) sensor electrical connector (5).
  4. Remove the air cleaner intake duct from the air cleaner housing (8) and the throttle body.
  5. Remove the MAF sensor from the air cleaner intake duct.

Installation Procedure

    Object Number: 811623 Size: SH
  1. Install the MAF sensor to the air cleaner intake duct.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the air cleaner intake duct to the air cleaner housing (8) and the throttle body.

    3. Tighten
    Tighten the clamps (2, 6) to 2 N·m (18 lb in).

  3. Connect the MAF sensor electrical connector (5).
  4. Connect the IAT sensor electrical connector (3).
  5. Start and idle the engine.
  6. Inspect the air cleaner intake duct for leaks.