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Home >> Nissan-Datsun >> 2009 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0443 To P0643 (Qr25DE) >> DTC P0643 Sensor Power Supply >> On Board Diagnosis Logic >> Notes

On Board Diagnosis Logic: Notes

This self-diagnosis has the one trip detection logic  .

DTC DETECTING CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0643
0643		 Sensor power supply circuit short ECM detects a voltage of power source for sensor is excessively low or high.
  • Harness or connectors

    (APP sensor 1 circuit is shorted.)

    (Throttle position sensor circuit is shorted.)

    [Camshaft position sensor (PHASE) circuit is shorted.]

  • Accelerator pedal position sensor

    (APP sensor 1)

  • Throttle position sensor

    (TP sensor 1 and 2)

  • Camshaft position sensor (PHASE)
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