GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Cavalier (CNG) 🢒 Engine 🢒 Engine Controls - 2.2L 🢒 Gas Mass Sensor/Mixture Control Valve Replacement

Removal Procedure

    Object Number: 401926 Size: SH

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Disconnect the electrical connectors.
  3. Remove the throttle cables from the retaining clip.
  4. Loosen the vapor hose clamp (9) at the outlet of the GMS/MCV.
  5. Remove the four screws from the GMS/MCV inlet elbow (8).
  6. Remove the GMS/MCV bracket attaching nuts from the isolators.
  7. Remove the GMS/MCV and bracket (3) from the module bracket (1).
  8. Remove the GMS/MCV from the bracket.

Installation Procedure

    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.


    Object Number: 401926 Size: SH
  1. Install the GMS/MCV to the bracket.

    2. Tighten
    Tighten the GMS/MCV to bracket nuts to 12 N·m (106 lb in).

  2. Install the GMS/MCV and bracket (3) to the isolation mounts on the module bracket (1).

    3. Tighten
    Tighten the GMS/MCV to module bracket nuts to 3.7 N·m 33 lb in).

  3. Install the GMS/MCV inlet elbow (8) using a new O-ring.

    4. Tighten
    Tighten the screws to 5.4 N·m (48 lb in).

  4. Tighten the fuel hose clamp (9).

    5. Tighten
    Tighten the fuel clamp to 2 N·m (18 lb in).

  5. Install the throttle cables to the retaining clip.
  6. Connect the electrical connectors.
  7. Connect the negative battery cable.

    8. Tighten
    Tighten the bolt to 15 N·m (11 lb ft).