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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls And Fuel - 4.6L - Introduction (2 Of 2)) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: Handle the oxygen sensors carefully in order to prevent damage to the component. Keep the electrical connector and the exhaust inlet end free of contaminants. Do not use cleaning solvents on the sensor. Do not drop or mishandle the sensor.
NOTE: Refer to Heated Oxygen Sensor Resistance Learn Reset Notice .
IMPORTANT: Remove the heated oxygen sensors (HO2S) with the engine temperature above 48°C (120°F). Otherwise the HO2S may be difficult to remove.
    Fig 1: View Of Engine Harness Electrical Connector & Clips
    GM1665455Courtesy of GENERAL MOTORS CORP.
  1. Remove the air deflector. Refer to Front Air Deflector Replacement .
  2. Remove the connector position assurance (CPA) retainer.
  3. Disconnect the engine harness electrical connector (3) from the heated oxygen sensor (HO2S).
  4. Remove the HO2S clip (2) from the engine bracket.
    5. Fig 2: Locating HO2S Wiring Harness Connector
    GM1670526Courtesy of GENERAL MOTORS CORP.
  5. Remove the HO2S.
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