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Home >> Infiniti >> 2012 >> M35h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0500 To P31A5 >> DTC P0643: Sensor Power Supply >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC No Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P0643 SENSOR POWER/CIRC (Sensor power supply circuit short) ECM detects that the voltage of power source for sensor is excessively low or high.
  • Harness or connectors (TP sensor circuit is shorted.) [CMP sensor (PHASE) (bank 1) circuit is shorted.] [Manifold absolute pressure (MAP) sensor circuit is shorted.] (Exhaust valve timing control position sensor circuit is shorted.) (EOP sensor circuit is shorted.)
  • Throttle position sensor
  • Camshaft position sensor (PHASE) (bank 1)
  • Manifold absolute pressure (MAP) sensor
  • Exhaust valve timing control position sensor
  • EOP sensor