FixVault

DTC Detection Logic

WARNING: This page is about a different car, the 2011 Nissan Leaf. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTING CONDITION AND POSSIBLE CAUSES

DTC Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P0643 SENSOR POWER SUPPLY (Sensor reference voltage A circuit high)
  • VCM detects that a voltage of power source for sensor remains 5.6 V or more.
  • VCM detects a voltage of power source for sensor remains less than 4.6 V.
  • Harness or connectors (Sensor power supply circuit is shorted.)
  • Accelerator pedal position sensor
  • Battery current sensor
  • Refrigerant pressure sensor