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Home >> Nissan-Datsun >> 2004 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 2280 (Engine Control System - DTCS P0447 Through P1168) >> DTC P0643 Sensor Power Supply >> On Board Diagnosis Logic >> Notes

On Board Diagnosis Logic: Notes

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

This self-diagnosis has the one trip detection logic. 

DTC DETECTING CONDITION - POSSIBLE CAUSE

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.)

    (PSP sensor circuit is shorted.)

    (Refrigerant pressure sensor circuit is shorted.)

    (Battery current sensor circuit is shorted.)

    (EVAP control system pressure sensor circuit is shorted.)

  • Accelerator pedal position sensor (APP sensor 1)
  • EVAP control system pressure sensor
  • Power steering pressure sensor
  • Refrigerant pressure sensor
  • Battery current sensor