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Home >> Subaru >> 2019 >> WRX STI Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Fuel Injection System (Except For STI)) >> Front Oxygen (A/F) Sensor >> Inspection

Front Oxygen (A/F) Sensor: Inspection

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  1. Check that the front oxygen (A/F) sensor has no deformation, cracks or other damages.
  2. Measure the resistance between front oxygen (A/F) sensor terminals.
    G10266246Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Standard
    2 and 3 2.5 - 4.0 Ω (when 20°C (68°F))