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Home >> Chevrolet >> 2004 >> Impala LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System 3.8L (Introduction) >> Repair Instructions >> Heated Oxygen Sensor Replacement - Position 2 >> Removal Procedure
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Removal Procedure

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.
  1. Raise and support the vehicle. Refer toLifting and Jacking the Vehicle in General Information.
  2. Remove the HO2S electrical connector retaining tab (1) from the HO2S electrical connector (2).
  3. Disconnect the HO2S electrical connector from the HO2S electrical connector (2).
  4. Use the J 39194  to remove the HO2S from the exhaust pipe. See Special Tools and Equipment .
    5. Fig 1: Removing HO2S (Position 2)
    GM402074Courtesy of GENERAL MOTORS CORP.
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