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Infiniti
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2004
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M45
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Repair and Diagnosis
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Engine Performance
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Engine Control System
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DTC P0139, P0159: Ho2S2
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Diagnostic Procedure
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4. Check Heated Oxygen Sensor 2
4. Check Heated Oxygen Sensor 2
Check the following.
Harness connectors E315, F5
joint connector-29
harness for open or short between HO2S2 and ground
: Repair open circuit or short to power in harness or connectors.