P0643 NISSAN Sensor Power Supply Circuit Short

Possible causes – Faulty Engine Control Module (ECM)– ECM harness is open or shorted– ECM circuit poor electrical connection– Shorted sensor on 5 volt circuit– Accelerator pedal position sensor (APP sensor 1)– Power steering pressure sensor– EVAP control system pressure sensor– Refrigerant pressure sensor When is the obd code mean? The Engine Control Module (ECM)…