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Infiniti
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2014
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Q50 Base, AWD
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Repair and Diagnosis
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Engine Performance
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Engine Control System - DTCS P0500 To P2101 (Except Hybrid)
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DTC P0643: Sensor Power Supply
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DTC Description
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DTC Detection Logic
DTC Detection Logic
DTC DETECTION CONDITION
DTC No.
CONSULT screen terms (Trouble diagnosis content)
DTC detecting condition
P0643
SENSOR POWER/CIRC (Sensor reference voltage "A" circuit high)
ECM detects that the voltage of power source for sensor is excessively low or high.