GM Service Manual Online
For 1990-2009 cars only
Makes šŸ¢’ Cadillac šŸ¢’ 2009 šŸ¢’ XLR šŸ¢’ Diagnostic Navigation šŸ¢’ Vehicle Diagnostic Information šŸ¢’ Heated Oxygen Sensor Replacement - Bank 1 Sensor 1

Removal Procedure

    Caution: Refer to Oxygen Sensor Caution in the Preface section.


    Object Number: 1685830 Size: SH

    Note: 

       ā€¢ Bank 1 on the LH2 engine is the right side of the engine while sitting in the driver seat.
       ā€¢ Sensor 1 is the sensor closest to the engine, or farthest forward towards the front of vehicle.
       ā€¢ A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 5613695 or equivalent.

  1. Release the lock tab, and disconnect the PCV foul air tube (1) from the PCV orifice fitting on the right camshaft cover. Refer to Positive Crankcase Ventilation Hose/Pipe/Tube Replacement.

    2. Object Number: 1763111 Size: SH
  2. Separate the bank 1, sensor 1 electrical connector assembly (1) from the fuel rail bracket.
  3. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.

    4. Object Number: 1763114 Size: SH
  4. Using a small screw driver, remove the electrical connector retainer from the electrical connector.

    5. Object Number: 1763112 Size: SH
  5. Separate the bank 1, sensor 2 electrical connector assembly (1) from the fuel rail bracket.
  6. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.
  7. Remove both oxygen sensor electrical connectors and wires from under the two engine wire harnesses.
  8. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

    9. Object Number: 1763117 Size: SH
  9. Remove the oxygen sensor wire harnesses from the retainer (1) at the rear of the engine.
  10. Note the wire routing for reassembly.

    11. Object Number: 1763320 Size: SH
  11. Gently pull the bank 1 sensor 1 oxygen sensor (2) wire harness and connector down from the engine compartment.
  12. Remove the bank 1 sensor 1 oxygen sensor (2) from the exhaust manifold.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1763320 Size: SH
  1. Install the bank 1 sensor 1 oxygen sensor (2) to the exhaust manifold. Tighten the heated oxygen sensor (HO2S) to 42 NĀ·m (31 lb ft).
  2. Lower the vehicle.
  3. Pull the exhaust sensor electrical connector and wire harness upward to the engine compartment.
  4. Route both oxygen sensor electrical connectors and wires under the two engine wire harnesses.
  5. Install the electrical connector retainer to the electrical connector.
  6. Connect both oxygen sensor electrical connectors to the engine wiring harness connectors.

    7. Object Number: 1760078 Size: SH
  7. Install both oxygen sensor electrical connector assemblies (1, 2) to the fuel rail brackets.

    8. Object Number: 1685830 Size: SH
  8. Connect the PCV foul air tube (1) to the PCV orifice fitting on the right camshaft cover. Refer to Positive Crankcase Ventilation Hose/Pipe/Tube Replacement.
  9. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

    10. Object Number: 1763117 Size: SH
  10. Install the oxygen sensor wire harnesses to the retainer (1) at the rear of the engine. Ensure that the wire harnesses are secure and away from hot exhaust components.
  11. Lower the vehicle.