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Home >> Cadillac >> 2009 >> STS V >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 4.4L - Introduction >> Repair Instructions >> Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 >> Removal Procedure

Removal Procedure

CAUTION: Refer to Oxygen Sensor Caution .
NOTE:
  • Bank 2 on the LC3 engine is the left side of the engine while sitting in the driver seat.
  • Sensor 1 is the sensor closest to the engine, or farthest towards the front of vehicle.
  • 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.
    Fig 1: Identifying Oxygen Sensor Electrical Connector
    GM1652888Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine sight shield. Refer to Intake Manifold Sight Shield Replacement .
  2. Remove the windshield wiper transmission. Refer to Windshield Wiper Transmission Replacement .
  3. Disconnect the oxygen sensor electrical connector (2) from the engine wiring harness at the rear of the left head.
  4. Note the wire routing and attachment points for reassembly.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
    6. Fig 2: View Of HO2S - Bank 2, Sensor 1
    GM887902Courtesy of GENERAL MOTORS CORP.
  6. Remove the oxygen sensor from the exhaust manifold.
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