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HOMESERVICE MANUALSTOYOTA20184RUNNER SR5, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE CONTROL SYSTEM - SERVICE INFORMATIONAIR FUEL RATIO SENSORREMOVAL [08/2015 - ]PROCEDURE
2018 Toyota 4Runner SR5, 4WD

Removal [08/2015 - ]: Procedure

2018 Toyota 4Runner SR5, 4WDSECTION Procedure
  1. REMOVE EXHAUST MANIFOLD SUB-ASSEMBLY 

    (Refer to REMOVAL [08/2015 - ] )

  2. REMOVE AIR FUEL RATIO SENSOR (for Bank 1 Sensor 1) 
    1. Using SST, remove the air fuel ratio sensor from the exhaust manifold sub-assembly RH.
      • SST: 09224-00010 
      GTY220910Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not use the air fuel ratio sensor if it has been subjected to physical shocks, such as being dropped, etc.

  3. REMOVE AIR FUEL RATIO SENSOR (for Bank 2 Sensor 1) 
    1. Using SST, remove the air fuel ratio sensor from the exhaust manifold sub-assembly LH.
      • SST: 09224-00010 
      GTY221378Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE:

      Do not use the air fuel ratio sensor if it has been subjected to physical shocks, such as being dropped, etc.

RENDER: 1.0x

NO RELATED

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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.