LEMON Manuals
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Mazda
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2004
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3 s, 4D Sedan, 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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Middle Heated Oxygen Sensor (Ho2S) Inspection [CALIFORNIA Emission Regulation Applicable Model]
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Middle HO2S Circuit Open/Short Inspection (Sensor)
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Open circuit
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Open circuit
If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
HO2S terminal A and PCM terminal 2AH
HO2S terminal B and PCM terminal 2AA