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Home >> Nissan-Datsun >> 2016 >> Versa Note S, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (3 Of 3) >> DTC/Circuit Diagnosis >> DTC P0643: Sensor Power Supply >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC No. Trouble diagnosis content DTC detecting condition Possible cause
P0643 Sensor power supply circuit short ECM detects a voltage of power source for sensor is excessively low or high.
  • Harness or connectors

    (Accelerator pedal position 1 circuit is shorted.)

    (Throttle position sensor 1 circuit is shorted.)

    (Camshaft position sensor circuit is shorted.)

    (Exhaust valve timing control position sensor circuit is shorted.)

    (Engine oil pressure sensor circuit is shorted.)

  • Accelerator pedal position sensor
  • Throttle position sensor
  • Camshaft position sensor
  • Exhaust valve timing control position sensor
  • Engine oil pressure sensor