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Home >> Mercury >> 2004 >> Marauder >> Repair and Diagnosis (Single Page) >> Engine Performance >> Remove, Overhaul & Install >> Electronic Engine Control System >> Removal And Installation >> Heated Oxygen Sensor (HO2S) -Rear >> Removal & Installation
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Removal & Installation

  1. Disconnect the battery ground cable. For additional information, refer to BATTERY, MOUNTING AND CABLES .
  2. Raise and support the vehicle. For additional information, refer to JACKING & LIFTING .
  3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
    Fig 1: Disconnecting Heated Oxygen Sensor (HO2S) Electrical Connector
    G02757482Courtesy of FORD MOTOR CO.
  4. Using the special tool, remove the HO2S.
    Fig 2: Removing HO2S Using Special Tool
    G02757483Courtesy of FORD MOTOR CO.
  5. To install, reverse the removal procedure.
    • Apply a light coat of lubricant to the threads of the heated oxygen sensors.
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