2008 Lexus IS FFACTORY OEM SERVICE PROCEDURE

Air Fuel Ratio Sensor: Removal

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL  (See REMOVAL )
  2. REMOVE ENGINE AND TRANSMISSION 
    1. Remove the engine and transmission (See REMOVAL ).
  3. REMOVE AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1) 
    1. Disconnect the air fuel ratio sensor connector.
    2. Using SST, remove the air fuel ratio sensor from the exhaust manifold LH.

      SST 09224-00010 

      Fig 1: Locating Air Fuel Ratio Sensor Connector
      G05751992Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. REMOVE AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1) 
    1. Disconnect the air fuel ratio sensor connector.
    2. Using SST, remove the air fuel ratio sensor from the exhaust manifold RH

      SST 09224-00010 

      Fig 2: Removing Air Fuel Ratio Sensor From Exhaust Manifold RH
      G05751993Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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