U3478

U3478 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3478 Diagnosis

The fuse in the main PDM powering this circuit may be open. The root cause could be excessive loads on an output, or a short to ground in the VBAT2 supply to the CHM.The position information for the switch becomes Not Available. Remove the duplicate Smart Switch, then use ServiceLink to verify that the correct Smart Switches are configured for the vehicle.

Engine starting is disabled and other optional functions may be interrupted until the fault is corrected and the ignition switch is cycled.

Ford U3478 Fault Code Meaning :

Ford U3478 Symptoms :

Ford U3478 Reasons :

How To Fix Ford U3478 Trouble Code ?

Which Ford cars have the code U3478?

  • U3478 Ford Aerostar
  • U3478 Ford Bronco
  • U3478 Ford C-Max
  • U3478 Ford C-Max Energi
  • U3478 Ford C-Max Hybrid
  • U3478 Ford Contour
  • U3478 Ford Crown Victoria
  • U3478 Ford EcoSport
  • U3478 Ford Econoline
  • U3478 Ford Edge
  • U3478 Ford Escape
  • U3478 Ford Escape Hybrid
  • U3478 Ford Escort
  • U3478 Ford Everest
  • U3478 Ford Excursion
  • U3478 Ford Expedition
  • U3478 Ford Explorer
  • U3478 Ford Explorer Sport Trac
  • U3478 Ford F-150
  • U3478 Ford F-250
  • U3478 Ford F-350
  • U3478 Ford Fiesta
  • U3478 Ford Flex
  • U3478 Ford Focus
  • U3478 Ford Focus Electric
  • U3478 Ford Freestar
  • U3478 Ford Freestyle
  • U3478 Ford Fusion
  • U3478 Ford Fusion Energi
  • U3478 Ford Fusion Hybrid
  • U3478 Ford Fusion Plug-In Hybrid
  • U3478 Ford GT
  • U3478 Ford Mustang
  • U3478 Ford Mustang Mach-E
  • U3478 Ford Mystique
  • U3478 Ford Probe
  • U3478 Ford Ranger
  • U3478 Ford Taurus
  • U3478 Ford Taurus X
  • U3478 Ford Tempo
  • U3478 Ford Thunderbird
  • U3478 Ford Transit
  • U3478 Ford Transit Connect
  • U3478 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.