P3904

P3904 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3904 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 P3904 Fault Code Meaning :

Ford P3904 Symptoms :

Ford P3904 Reasons :

How To Fix Ford P3904 Trouble Code ?

Which Ford cars have the code P3904?

  • P3904 Ford Aerostar
  • P3904 Ford Bronco
  • P3904 Ford C-Max
  • P3904 Ford C-Max Energi
  • P3904 Ford C-Max Hybrid
  • P3904 Ford Contour
  • P3904 Ford Crown Victoria
  • P3904 Ford EcoSport
  • P3904 Ford Econoline
  • P3904 Ford Edge
  • P3904 Ford Escape
  • P3904 Ford Escape Hybrid
  • P3904 Ford Escort
  • P3904 Ford Everest
  • P3904 Ford Excursion
  • P3904 Ford Expedition
  • P3904 Ford Explorer
  • P3904 Ford Explorer Sport Trac
  • P3904 Ford F-150
  • P3904 Ford F-250
  • P3904 Ford F-350
  • P3904 Ford Fiesta
  • P3904 Ford Flex
  • P3904 Ford Focus
  • P3904 Ford Focus Electric
  • P3904 Ford Freestar
  • P3904 Ford Freestyle
  • P3904 Ford Fusion
  • P3904 Ford Fusion Energi
  • P3904 Ford Fusion Hybrid
  • P3904 Ford Fusion Plug-In Hybrid
  • P3904 Ford GT
  • P3904 Ford Mustang
  • P3904 Ford Mustang Mach-E
  • P3904 Ford Mystique
  • P3904 Ford Probe
  • P3904 Ford Ranger
  • P3904 Ford Taurus
  • P3904 Ford Taurus X
  • P3904 Ford Tempo
  • P3904 Ford Thunderbird
  • P3904 Ford Transit
  • P3904 Ford Transit Connect
  • P3904 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.