P3478

P3478 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3478 Diagnosis

The output circuits that are powered by VBAT2 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. The BHM is detecting more than one smart switch with the same ID number present on the vehicle. The outputs controlled by the switch and the indicator in the switch are commanded OFF.

The disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.

Ford P3478 Fault Code Meaning :

Ford P3478 Symptoms :

Ford P3478 Reasons :

How To Fix Ford P3478 Trouble Code ?

Which Ford cars have the code P3478?

  • P3478 Ford Aerostar
  • P3478 Ford Bronco
  • P3478 Ford C-Max
  • P3478 Ford C-Max Energi
  • P3478 Ford C-Max Hybrid
  • P3478 Ford Contour
  • P3478 Ford Crown Victoria
  • P3478 Ford EcoSport
  • P3478 Ford Econoline
  • P3478 Ford Edge
  • P3478 Ford Escape
  • P3478 Ford Escape Hybrid
  • P3478 Ford Escort
  • P3478 Ford Everest
  • P3478 Ford Excursion
  • P3478 Ford Expedition
  • P3478 Ford Explorer
  • P3478 Ford Explorer Sport Trac
  • P3478 Ford F-150
  • P3478 Ford F-250
  • P3478 Ford F-350
  • P3478 Ford Fiesta
  • P3478 Ford Flex
  • P3478 Ford Focus
  • P3478 Ford Focus Electric
  • P3478 Ford Freestar
  • P3478 Ford Freestyle
  • P3478 Ford Fusion
  • P3478 Ford Fusion Energi
  • P3478 Ford Fusion Hybrid
  • P3478 Ford Fusion Plug-In Hybrid
  • P3478 Ford GT
  • P3478 Ford Mustang
  • P3478 Ford Mustang Mach-E
  • P3478 Ford Mystique
  • P3478 Ford Probe
  • P3478 Ford Ranger
  • P3478 Ford Taurus
  • P3478 Ford Taurus X
  • P3478 Ford Tempo
  • P3478 Ford Thunderbird
  • P3478 Ford Transit
  • P3478 Ford Transit Connect
  • P3478 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.