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Home >> Subaru >> 2021 >> Ascent Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System >> Front Oxygen (A/F) Sensor >> Inspection

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.
    G13198321Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Standard
2 and 3 Approx. 3.5 Ω (when 20°C (68°F))
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