B3901

B3901 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B3901 Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open circuit fault.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 B3901 Fault Code Meaning :

Ford B3901 Symptoms :

Ford B3901 Reasons :

How To Fix Ford B3901 Trouble Code ?

Which Ford cars have the code B3901?

  • B3901 Ford Aerostar
  • B3901 Ford Bronco
  • B3901 Ford C-Max
  • B3901 Ford C-Max Energi
  • B3901 Ford C-Max Hybrid
  • B3901 Ford Contour
  • B3901 Ford Crown Victoria
  • B3901 Ford EcoSport
  • B3901 Ford Econoline
  • B3901 Ford Edge
  • B3901 Ford Escape
  • B3901 Ford Escape Hybrid
  • B3901 Ford Escort
  • B3901 Ford Everest
  • B3901 Ford Excursion
  • B3901 Ford Expedition
  • B3901 Ford Explorer
  • B3901 Ford Explorer Sport Trac
  • B3901 Ford F-150
  • B3901 Ford F-250
  • B3901 Ford F-350
  • B3901 Ford Fiesta
  • B3901 Ford Flex
  • B3901 Ford Focus
  • B3901 Ford Focus Electric
  • B3901 Ford Freestar
  • B3901 Ford Freestyle
  • B3901 Ford Fusion
  • B3901 Ford Fusion Energi
  • B3901 Ford Fusion Hybrid
  • B3901 Ford Fusion Plug-In Hybrid
  • B3901 Ford GT
  • B3901 Ford Mustang
  • B3901 Ford Mustang Mach-E
  • B3901 Ford Mystique
  • B3901 Ford Probe
  • B3901 Ford Ranger
  • B3901 Ford Taurus
  • B3901 Ford Taurus X
  • B3901 Ford Tempo
  • B3901 Ford Thunderbird
  • B3901 Ford Transit
  • B3901 Ford Transit Connect
  • B3901 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.