GM Service Manual Online
For 1990-2009 cars only
Makes šŸ¢’ Cadillac šŸ¢’ 2009 šŸ¢’ XLR šŸ¢’ Engine šŸ¢’ Engine Controls and Fuel - 4.4L šŸ¢’ Heated Oxygen Sensor Replacement - Bank 2 Sensor 2

Removal Procedure

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


    Object Number: 1763109 Size: SH

    Note: 

       ā€¢ Bank 2 on the LH2 engine is the left side of the engine while sitting in the driver seat.
       ā€¢ Sensor 2 is the second sensor down stream from the engine towards the rear of the 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. Separate the bank 2, sensor 1 electrical connector assembly (1) from the fuel rail bracket.
  2. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.

    3. Object Number: 1763110 Size: SH
  3. Separate the bank 2, sensor 2 electrical connector assembly (1) from the fuel rail bracket.
  4. Disconnect the oxygen sensor electrical connector from the engine wiring harness connector.

    5. Object Number: 1685834 Size: SH
  5. Disconnect the evaporative emission (EVAP) hose (3) from the chassis bundle at the front of dash. Position the hose aside.
  6. Disconnect the brake booster hose and check valve from the brake booster. Position the hose aside.
  7. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

    8. Object Number: 1763115 Size: SH
  8. Remove the oxygen sensor wire harnesses from the retainer (1) at the rear of the engine.
  9. Note the wire routing for reassembly.

    10. Object Number: 1763317 Size: SH
  10. Gently pull the bank 2 sensor 2 oxygen sensor (2) wire harness and connector down from the engine compartment.
  11. Remove the bank 2 sensor 2 oxygen sensor (2) from the exhaust manifold.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1763317 Size: SH
  1. Install the bank 2 sensor 2 oxygen sensor (2) to the exhaust manifold and 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. Install the electrical connector retainer to the electrical connector.
  5. Connect both oxygen sensor electrical connectors to the engine wiring harness connectors.

    6. Object Number: 1760081 Size: SH
  6. Install both oxygen sensor electrical connector assemblies (1, 2) to the fuel rail brackets.

    7. Object Number: 1685834 Size: SH
  7. Connect the brake booster hose and check valve to the brake booster.
  8. Connect the evaporative emission (EVAP) hose (3) to the chassis bundle at the front of dash.
  9. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle.

    10. Object Number: 1763115 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.