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Home >> Subaru >> 2020 >> Forester Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System >> Front Oxygen (A/F) Sensor >> Inspection
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Front Oxygen (A/F) Sensor: Inspection

  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.
    G11252908Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Standard
    1 and 2 2.0±0.2 Ω (when 20°C (68°F))
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