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Air Fuel Ratio Sensor: Inspection

  1. INSPECT AIR FUEL RATIO SENSOR 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      1 (HA1A) - 2 (+B) (Bank 1) 20°C (68°F) 1.8 to 3.4 Ω
      1 (HA2A) - 2 (+B) (Bank 2)

      If the result is not as specified, replace the sensor.

      Fig 1: Identifying Air Fuel Ratio Sensor Connector
      G05628281Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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