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Home >> Infiniti >> 2013 >> M35h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes & Symptom Tests) >> DTC/Circuit Diagnosis >> DTC P0643: Sensor Power Supply >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P0643 SENSOR POWER/CIRC (Sensor power supply circuit short) ECM detects that the voltage of power source for sensor is excessively low or high.
  • Harness or connectors

    (TP sensor circuit is shorted.)

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

    [Manifold absolute pressure (MAP) sensor circuit is shorted.]

    (Exhaust valve timing control position sensor circuit is shorted.)

    (EOP sensor circuit is shorted.)

  • Throttle position sensor
  • Camshaft position sensor (PHASE) (bank 1)
  • Manifold absolute pressure (MAP) sensor
  • Exhaust valve timing control position sensor
  • EOP sensor