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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 101 (Engine Control System - 3.8L - Introduction (2 Of 2)) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Position 2 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The oxygen sensor may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may damage threads in the exhaust manifold or the exhaust pipe.
    Fig 1: View Of Heated Oxygen Sensor (Position 2)
    GM911099Courtesy of GENERAL MOTORS CORP.
  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the heated oxygen sensor (HO2S) electrical connector retaining clip from the HO2S electrical harness connector.
  3. Disconnect the HO2S electrical connector from the HO2S electrical harness connector.
    4. IMPORTANT: Remove the oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.
  4. Use the J 39194  to remove the O2S from the exhaust pipe. See Special Tools .
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