B0478

B0478 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B0478 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 B0478 Fault Code Meaning :

Ford B0478 Symptoms :

Ford B0478 Reasons :

How To Fix Ford B0478 Trouble Code ?

Which Ford cars have the code B0478?

  • B0478 Ford Aerostar
  • B0478 Ford Bronco
  • B0478 Ford C-Max
  • B0478 Ford C-Max Energi
  • B0478 Ford C-Max Hybrid
  • B0478 Ford Contour
  • B0478 Ford Crown Victoria
  • B0478 Ford EcoSport
  • B0478 Ford Econoline
  • B0478 Ford Edge
  • B0478 Ford Escape
  • B0478 Ford Escape Hybrid
  • B0478 Ford Escort
  • B0478 Ford Everest
  • B0478 Ford Excursion
  • B0478 Ford Expedition
  • B0478 Ford Explorer
  • B0478 Ford Explorer Sport Trac
  • B0478 Ford F-150
  • B0478 Ford F-250
  • B0478 Ford F-350
  • B0478 Ford Fiesta
  • B0478 Ford Flex
  • B0478 Ford Focus
  • B0478 Ford Focus Electric
  • B0478 Ford Freestar
  • B0478 Ford Freestyle
  • B0478 Ford Fusion
  • B0478 Ford Fusion Energi
  • B0478 Ford Fusion Hybrid
  • B0478 Ford Fusion Plug-In Hybrid
  • B0478 Ford GT
  • B0478 Ford Mustang
  • B0478 Ford Mustang Mach-E
  • B0478 Ford Mystique
  • B0478 Ford Probe
  • B0478 Ford Ranger
  • B0478 Ford Taurus
  • B0478 Ford Taurus X
  • B0478 Ford Tempo
  • B0478 Ford Thunderbird
  • B0478 Ford Transit
  • B0478 Ford Transit Connect
  • B0478 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.