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Rear Oxygen Sensor: Inspection

  1. Check that the rear oxygen sensor has no deformation, cracks or other damages.
  2. Measure the resistance between rear oxygen sensor terminals.
    Fig 1: Measuring Resistance Between Rear Oxygen Sensor Terminals 1 And 2
    G08315454Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Standard
    1 and 2 Approx. 5.6 Ω (when 20°C (68°F))
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