B3478

B3478 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B3478 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.The wiper switch is in the OFF position and the BHM park input from the wiper motor is not in park position. Troubleshoot for a wiper motor park switch circuit fault.

The suspension dump output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for suspension dump air solenoid fault, and for air pressure switch short circuit fault.

Ford B3478 Fault Code Meaning :

Ford B3478 Symptoms :

Ford B3478 Reasons :

How To Fix Ford B3478 Trouble Code ?

Which Ford cars have the code B3478?

  • B3478 Ford Aerostar
  • B3478 Ford Bronco
  • B3478 Ford C-Max
  • B3478 Ford C-Max Energi
  • B3478 Ford C-Max Hybrid
  • B3478 Ford Contour
  • B3478 Ford Crown Victoria
  • B3478 Ford EcoSport
  • B3478 Ford Econoline
  • B3478 Ford Edge
  • B3478 Ford Escape
  • B3478 Ford Escape Hybrid
  • B3478 Ford Escort
  • B3478 Ford Everest
  • B3478 Ford Excursion
  • B3478 Ford Expedition
  • B3478 Ford Explorer
  • B3478 Ford Explorer Sport Trac
  • B3478 Ford F-150
  • B3478 Ford F-250
  • B3478 Ford F-350
  • B3478 Ford Fiesta
  • B3478 Ford Flex
  • B3478 Ford Focus
  • B3478 Ford Focus Electric
  • B3478 Ford Freestar
  • B3478 Ford Freestyle
  • B3478 Ford Fusion
  • B3478 Ford Fusion Energi
  • B3478 Ford Fusion Hybrid
  • B3478 Ford Fusion Plug-In Hybrid
  • B3478 Ford GT
  • B3478 Ford Mustang
  • B3478 Ford Mustang Mach-E
  • B3478 Ford Mystique
  • B3478 Ford Probe
  • B3478 Ford Ranger
  • B3478 Ford Taurus
  • B3478 Ford Taurus X
  • B3478 Ford Tempo
  • B3478 Ford Thunderbird
  • B3478 Ford Transit
  • B3478 Ford Transit Connect
  • B3478 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.