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Home >> Infiniti >> 2013 >> M56 Sport >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0190 To P1084 >> 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 (Throttle position sensor circuit is shorted.)

    [Camshaft position sensor (bank 2) circuit is shorted.]

    (Manifold absolute pressure sensor circuit is shorted.)

    (Accelerator pedal position sensor 1 circuit is shorted.)

  • Throttle position sensor
  • Camshaft position sensor (bank 2)
  • Manifold absolute pressure sensor
  • Accelerator pedal position sensor 1
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