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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 2 >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Turn the ignition OFF.
  2. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
    3. Fig 1: View Of HO2S Electrical Connector, Sensor 2 (Bank 1 Shown, Bank 2 Similar)
    GM1201222Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the heated oxygen sensor (HO2S) electrical connector (bank 1 shown, bank 2 similar).
  4. Remove the HO2S wiring harness from the transmission case.
    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
    GM1306432Courtesy of GENERAL MOTORS CORP.
  5. Remove the HO2S.
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