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Mazda
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2004
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3 i, Automatic
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Repair and Diagnosis
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Engine Performance
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Engine Control System
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Rear Heated Oxygen Sensor (Ho2S) Inspection
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Rear HO2S circuit open/short inspection (sensor)
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Notes
Rear HO2S circuit open/short inspection (sensor): Notes
Disconnect the PCM connector.
Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)