GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2002 🢒 Regal 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Crankshaft Position Sensor Replacement

Removal Procedure

    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. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  3. Remove the right splash shield cover. Refer to Engine Splash Shield Replacement in Body Front End.
  4. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement in Engine Mechanical - 3.8L.
  5. Disconnect the crankshaft position (CKP) sensor electrical connector.

    6. Object Number: 12302 Size: SH
  6. Remove the CKP shield (1). DO NOT use a pry bar.
  7. Remove the CKP sensor studs.

    8. Object Number: 12303 Size: SH
  8. Remove the CKP sensor.

Installation Procedure

    Object Number: 12303 Size: SH
  1. Install the CKP sensor.

    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 CKP sensor studs.

    3. Tighten
    Tighten the studs to 30 N·m (22 lb ft).


    Object Number: 12302 Size: SH
  3. Install the CKP sensor shield (1).
  4. Connect the CKP sensor electrical connector.
  5. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement in Engine Mechanical - 3.8L.
  6. Install the right splash shield cover. Refer to Engine Splash Shield Replacement in Body Front End.
  7. Lower the vehicle.
  8. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
  9. Perform the crankshaft position system variation learn procedure. Refer to Crankshaft Position System Variation Learn .