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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Controls - 3.6L - Introduction) >> Repair Instructions >> Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 1 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Disconnecting Heated Oxygen Sensor (HO2S) Electrical Connector
    GM887894Courtesy of GENERAL MOTORS CORP.
  1. Turn the ignition OFF.
  2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
  3. Remove the HO2S electrical connector from the wiring harness bracket.
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
    5. NOTE: Refer to Oxygen Sensor Notice in Cautions and Notices.
    IMPORTANT: Removal of the oxygen sensor is easier when the engine temperature is above 48°C (120°F).
    Fig 2: Removing HO2S From Catalytic Converter
    GM887896Courtesy of GENERAL MOTORS CORP.
  5. Remove the HO2S from the catalytic converter.
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