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Mazda
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2010
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5 Touring, 2.3 L
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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]
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Heated Oxygen Sensor (Ho2S) Inspection
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HO2S Circuit Open/short Inspection
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Open circuit
Open circuit
If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
HO2S terminal A and PCM terminal 2Q
HO2S terminal B and PCM terminal 2AV