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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 2 Sensor 1 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the left side air inlet panel. Refer to Air Inlet Grille Panel Replacement (LHD) or Air Inlet Grille Panel Replacement (RHD) in Body Front End.
  2. 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 1: Disconnecting Heated Oxygen Sensor (HO2S) Electrical Connector
    GM887890Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
  4. Remove the HO2S electrical connector from the wiring harness bracket.
  5. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  6. Fig 2: Removing HO2S
    GM887892Courtesy of GENERAL MOTORS CORP.
  7. Remove the HO2S.