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DTC P0643 SENSOR POWER SUPPLY EC-475 C D E F G H I J K L M A EC 2007 Pathfinder DTC P0643 SENSOR POWER SUPPLY PFP:18919 On Board Diagnosis Logic UBS00KDY This self-diagnosis has the one trip detection logic. FAIL-SAFE MODE When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up. DTC Confirmation Procedure UBS00KDZ NOTE: WITH CONSULT-II 1. Turn ignition switch ON. 2. Select “DATA MONITOR” mode with CONSULT-II. 3. Start engine and let it idle for 1 second. 4. If DTC is detected, go to EC-478, "Diagnostic Procedure" WITH GST Follow the procedure “WITH CONSULT-II” above. DTC No. Trouble diagnosis name DTC detecting condition Possible cause P0643 Sensor power supply ECM detects a voltage of power source for ● Harness or connectors ● Accelerator pedal position sensor ● EVAP control system pressure sensor ● Power steering pressure sensor ● Refrigerant pressure sensor ● Battery current sensor Engine operation condition in fail-safe mode ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return SEF058Y |