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Home › Mazda › 2005 › 3 i, Automatic › Repair and Diagnosis › Engine Performance › Engine Control Systems › Middle Heated Oxygen Sensor (Ho2S) Inspection [CALIFORNIA Emission Regulation Applicable Model] › Middle HO2S Circuit Open/Short Inspection (Sensor) › Notes

Middle HO2S Circuit Open/Short Inspection (Sensor): Notes

  1. Disconnect the PCM connector.
  2. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
    Fig 1: Identifying Middle HO2S Harness Connector
    G03636149Courtesy of MAZDA MOTORS CORP.
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