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Home >> Saturn >> 2005 >> Vue Red Line, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 3.5L (L66) Introduction >> Repair Instructions >> Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 2 >> Removal Procedure

Removal Procedure

    IMPORTANT: Bank 1 are cylinders 1, 3, and 5 which are the closest to the front of the dash.
  1. Turn the ignition OFF.
  2. Disconnect the bank 1 heated oxygen sensor 2 harness connector (2).
    Fig 1: View Of Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
    GM1228627Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the connectors from the retaining bracket.
  4. Remove the heated oxygen sensor connector retaining bracket and bolt.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  6. Remove the heated oxygen sensor wiring harness bracket and bolt.
    7. CAUTION: Removal of the sensor is easier if the exhaust system is warmed up slightly. Be careful that it is not too hot to work on safely. Applying penetrating oil to the threads while moving the sensor back and forth will also aid in removal and will decrease the chance of exhaust pipe thread damage.
    Fig 2: View Of Heated Oxygen Sensor Bank 1 Sensor 2
    GM1226398Courtesy of GENERAL MOTORS CORP.
  7. Remove the bank 1 heated oxygen sensor 2 using the J 39194-C  .
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