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DTC Detection Logic

WARNING: This page is about a different car, the 2010 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION LOGIC CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0643 Sensor power supply circuit short ECM detects that the voltage of power source for sensor is excessively low or high.
  • Harness or connectors [Accelerator pedal position (APP) sensor 1 circuit is shorted.]

    [Throttle position (TP) sensor circuit is shorted.]

    [Camshaft position (CMP) sensor (bank 1) circuit is shorted.]

    [Exhaust valve timing (EVT) control position sensor (bank 1) circuit is shorted.]

    [Power steering pressure (PSP) sensor circuit is shorted.]

  • APP sensor
  • TP sensor
  • CMP sensor (bank 1)
  • EVT control position sensor (bank 1)
  • PSP sensor
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