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Mazda
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2007
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6 Mazdaspeed
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Repair and Diagnosis
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Engine Performance
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Engine Control Systems
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Engine Control System (L3 With TC)
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Heated Oxygen Sensor (Ho2S) Inspection
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Rear HO2S Circuit Open/Short Inspection (Sensor)
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Open circuit
Open circuit
If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
Rear HO2S terminal A and PCM terminal 1Y
Rear HO2S terminal B and PCM terminal 2H