U3400

U3400 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3400 Diagnosis

The fault remains active until the ignition is turned ON when the fault is no longer present. Some BHM configurations force this circuit off until the ignition switch is cycled.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 U3400 Fault Code Meaning :

Ford U3400 Symptoms :

Ford U3400 Reasons :

How To Fix Ford U3400 Trouble Code ?

Which Ford cars have the code U3400?

  • U3400 Ford Aerostar
  • U3400 Ford Bronco
  • U3400 Ford C-Max
  • U3400 Ford C-Max Energi
  • U3400 Ford C-Max Hybrid
  • U3400 Ford Contour
  • U3400 Ford Crown Victoria
  • U3400 Ford EcoSport
  • U3400 Ford Econoline
  • U3400 Ford Edge
  • U3400 Ford Escape
  • U3400 Ford Escape Hybrid
  • U3400 Ford Escort
  • U3400 Ford Everest
  • U3400 Ford Excursion
  • U3400 Ford Expedition
  • U3400 Ford Explorer
  • U3400 Ford Explorer Sport Trac
  • U3400 Ford F-150
  • U3400 Ford F-250
  • U3400 Ford F-350
  • U3400 Ford Fiesta
  • U3400 Ford Flex
  • U3400 Ford Focus
  • U3400 Ford Focus Electric
  • U3400 Ford Freestar
  • U3400 Ford Freestyle
  • U3400 Ford Fusion
  • U3400 Ford Fusion Energi
  • U3400 Ford Fusion Hybrid
  • U3400 Ford Fusion Plug-In Hybrid
  • U3400 Ford GT
  • U3400 Ford Mustang
  • U3400 Ford Mustang Mach-E
  • U3400 Ford Mystique
  • U3400 Ford Probe
  • U3400 Ford Ranger
  • U3400 Ford Taurus
  • U3400 Ford Taurus X
  • U3400 Ford Tempo
  • U3400 Ford Thunderbird
  • U3400 Ford Transit
  • U3400 Ford Transit Connect
  • U3400 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.