Air Fuel Ratio Sensor: Inspection

2009 Toyota FJ Cruiser RWDSECTION Inspection
  1. REMOVE AIR FUEL RATIO SENSOR 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard resistance 

        AIR FUEL RATIO SENSOR

        Tester Connection Specified Condition
        1 (HT) - 2 (+B) 1.8 to 3.4 Ω at 20°C (68°F)
        1 (HT) - 4 (E) 10 kΩ or higher

        If the result is not as specified, replace the air fuel ratio sensor.

        Fig 1: Measuring Resistance Between Terminals Using Ohmmeter
        G05109777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

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.