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Home >> Cadillac >> 2017 >> XTS Livery >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Engine Controls And Fuel - 3.6L (LFX LF3) - Repair Instructions >> Repair Instructions >> Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF3) >> Removal Procedure

Removal Procedure

WARNING:

In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

WARNING:

Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

CAUTION:

Refer to Heated Oxygen and Oxygen Sensor Caution .

CAUTION:

Refer to Heated Oxygen Sensor Resistance Learn Reset Caution .

CAUTION:

The use of excessive force may damage the threads in the exhaust manifold/pipe.

NOTE:
  • The heated oxygen sensor in-line connector and louvered end MUST be kept clear of all grease, dirt, and other contaminants. Do NOT use cleaning solvents of any type. Do NOT drop or roughly handle the sensor.
  • The heated oxygen sensor MAY be difficult to remove when the engine temperature is less than 48°C (120°F).
  • A special anti-seize compound is used on the heated oxygen sensor threads. The compound consists of liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will have the compound already applied to the threads. IF a sensor is removed and is to be reinstalled, the threads MUST have an anti-seize compound applied before installation. Adhesives, Fluids, Lubricants, and Sealers
  1. Remove Air Cleaner Assembly Air Cleaner Assembly Replacement (LF3) 
  2. Remove Air Cleaner Outlet Resonator Air Cleaner Outlet Resonator Replacement (LF3) 
  3. Remove Evaporative Emission Canister Purge Solenoid Valve Evaporative Emission Canister Purge Solenoid Valve Replacement (LF3) 
  4. Reposition Charge Air Bypass Valve-Right Side Charge Air Bypass Valve Replacement - Right Side (LF3) 
    5. Fig 1: Electrical Connector, Engine Wiring Harness And Clips
    GM4847366Courtesy of GENERAL MOTORS COMPANY
  5. Disconnect the electrical connector (1) at the ignition coil.
  6. Remove the engine wiring harness clips (2) from the camshaft cover.
  7. Reposition the engine wiring harness (3) as necessary.
  8. Disconnect the heated oxygen sensor wiring connector (4) from the electrical connector.
  9. Raise and support the vehicle. Lifting and Jacking the Vehicle
  10. Separate Steering Linkage Outer Tie Rod@Steering Knuckle Steering Linkage Outer Tie Rod Replacement
  11. Remove Front Wheelhouse Front Liner-Right Side Front Wheelhouse Front Liner Replacement
    12. Fig 2: Heated Oxygen Sensor
    GM4847370Courtesy of GENERAL MOTORS COMPANY
  12. Remove the heated oxygen sensor (1).
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