GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2003 🢒 Century 🢒 Engine 🢒 Engine Controls - 3.1L 🢒 Camshaft Position Sensor Replacement

Removal Procedure

    Object Number: 16120 Size: SH
  1. Remove the power steering pump. Refer to Power Steering Pump Replacement in Power Steering Systems.
  2. Disconnect the camshaft position (CMP) sensor electrical connector.
  3. Remove the CMP sensor bolt.
  4. Remove the CMP sensor.
  5. Inspect the sensor O-ring for wear, cracks or leakage if the sensor is not being replaced.

Installation Procedure
  1. Lubricate the O-ring with clean engine oil. Replace the O-ring if the O-ring is damaged.
  2. Install the CMP camshaft position sensor.

    3. Object Number: 16120 Size: SH

    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.

  3. Install the CMP sensor bolt.

    4. Tighten
    Tighten the bolt to 8 N·m (71 lb in).

  4. Connect the CMP sensor electrical connector.
  5. Install the power steering pump. Refer to Power Steering Pump Replacement in Power Steering Systems.