DTC Detection Logic

DTC No.

Trouble diagnosis content

DTC detecting condition

Possible cause

P0643

Sensor power supply circuit short

ECM detects a voltage of power source for sensor is excessively low or high.

• Harness or connectors

  (Accelerator pedal position 1 circuit is shorted.)

  (Throttle position sensor 1 circuit is shorted.)

  (Camshaft position sensor circuit is shorted.)

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

  (Engine oil pressure sensor circuit is shorted.)

• Accelerator pedal position sensor
• Throttle position sensor
• Camshaft position sensor
• Exhaust valve timing control position sensor
• Engine oil pressure sensor