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Home >> Pontiac >> 2007 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls & Fuel - 3.8L - Introduction (2 Of 2)) >> Repair Instructions >> Heated Oxygen Sensor 2 Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: The Heated Oxygen Sensor (HO2S) and the Oxygen Sensor use a permanently attached pigtail and connector. Do not remove this pigtail from the Heated Oxygen Sensor. Damage or the removal of the pigtail or the connector could affect the proper operation of the sensor.
Take care when handling the HO2S and the O2S. Keep the in-line electrical connector and the louvered end free of grease, dirt, or other contaminants. Also avoid using cleaning solvents of any type. Do not drop the HO2S or the O2S. Do not roughly handle the HO2S or the O2S.
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: 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 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 oxygen sensor from the exhaust pipe. See Special Tools .
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