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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.
    Fig 1: Measuring Resistance Between Front Oxygen (A/F) Sensor Terminals 1 And 2
    G08315454Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Standard
    1 and 2 2.2+0.45-0.22 Ω (when 20°C (68°F))
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