C3903

C3903 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C3903 Diagnosis

The output circuits that are powered by VBAT2 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. Determine if the extra switch is not required for the vehicle or if the switch has been installed but the necessary reference parameter has not been programmed into the BHM.

The BHM measures the current on this circuit when the starter output is commanded ON. This fault indicates the magnetic switch or the wiring between the BHM and the magnetic switch is open circuit.

Ford C3903 Fault Code Meaning :

Ford C3903 Symptoms :

Ford C3903 Reasons :

How To Fix Ford C3903 Trouble Code ?

Which Ford cars have the code C3903?

  • C3903 Ford Aerostar
  • C3903 Ford Bronco
  • C3903 Ford C-Max
  • C3903 Ford C-Max Energi
  • C3903 Ford C-Max Hybrid
  • C3903 Ford Contour
  • C3903 Ford Crown Victoria
  • C3903 Ford EcoSport
  • C3903 Ford Econoline
  • C3903 Ford Edge
  • C3903 Ford Escape
  • C3903 Ford Escape Hybrid
  • C3903 Ford Escort
  • C3903 Ford Everest
  • C3903 Ford Excursion
  • C3903 Ford Expedition
  • C3903 Ford Explorer
  • C3903 Ford Explorer Sport Trac
  • C3903 Ford F-150
  • C3903 Ford F-250
  • C3903 Ford F-350
  • C3903 Ford Fiesta
  • C3903 Ford Flex
  • C3903 Ford Focus
  • C3903 Ford Focus Electric
  • C3903 Ford Freestar
  • C3903 Ford Freestyle
  • C3903 Ford Fusion
  • C3903 Ford Fusion Energi
  • C3903 Ford Fusion Hybrid
  • C3903 Ford Fusion Plug-In Hybrid
  • C3903 Ford GT
  • C3903 Ford Mustang
  • C3903 Ford Mustang Mach-E
  • C3903 Ford Mystique
  • C3903 Ford Probe
  • C3903 Ford Ranger
  • C3903 Ford Taurus
  • C3903 Ford Taurus X
  • C3903 Ford Tempo
  • C3903 Ford Thunderbird
  • C3903 Ford Transit
  • C3903 Ford Transit Connect
  • C3903 Ford Windstar

A code is a fault code and it indicates that something has gone wrong with your car's engine.

It can be caused by many different problems, including a faulty battery, a bad fuel pump, or even a cracked exhaust manifold.

You will need to diagnose the problem before you can fix it. The best way to do this is with an OBD scanner tool.

A scan tool will tell you what needs fixing and how much it will cost in order to fix that particular issue.