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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 891 (Engine Control System (Diagnostic Codes & Symptom Tests)) >> DTC/Circuit Diagnosis >> DTC P0643: Sensor Power Supply >> On Board Diagnosis Logic >> Notes

On Board Diagnosis Logic: Notes

WARNING: This page is about a different car, the 2013 Nissan Armada. 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 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.)

    (Battery current sensor circuit is shorted.)

    (Refrigerant pressure sensor circuit is shorted.)

    (EVAP control system pressure sensor circuit is shorted.)

  • Accelerator pedal position sensor
  • Power steering pressure sensor
  • Refrigerant pressure sensor
  • EVAP control system pressure sensor