Mike's Workshop Manuals
: Service manuals for every vehicle
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Mazda
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2008
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3 Mazdaspeed, 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 With TC)
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Heated Oxygen Sensor (Ho2S) Inspection [L3 With TC]
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Rear 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.
Rear HO2S terminal A and PCM terminal 2Q
Rear HO2S terminal B and PCM terminal 1BC