U3391

U3391 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3391 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.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.

This circuit connects to the CHM as an input at connector J3,P. The CHM passes the signal through to power the tail lamps and marker lamps from connector C2 pin G and also from connector C1 pins D, E, and F.

Ford U3391 Fault Code Meaning :

Ford U3391 Symptoms :

Ford U3391 Reasons :

How To Fix Ford U3391 Trouble Code ?

Which Ford cars have the code U3391?

  • U3391 Ford Aerostar
  • U3391 Ford Bronco
  • U3391 Ford C-Max
  • U3391 Ford C-Max Energi
  • U3391 Ford C-Max Hybrid
  • U3391 Ford Contour
  • U3391 Ford Crown Victoria
  • U3391 Ford EcoSport
  • U3391 Ford Econoline
  • U3391 Ford Edge
  • U3391 Ford Escape
  • U3391 Ford Escape Hybrid
  • U3391 Ford Escort
  • U3391 Ford Everest
  • U3391 Ford Excursion
  • U3391 Ford Expedition
  • U3391 Ford Explorer
  • U3391 Ford Explorer Sport Trac
  • U3391 Ford F-150
  • U3391 Ford F-250
  • U3391 Ford F-350
  • U3391 Ford Fiesta
  • U3391 Ford Flex
  • U3391 Ford Focus
  • U3391 Ford Focus Electric
  • U3391 Ford Freestar
  • U3391 Ford Freestyle
  • U3391 Ford Fusion
  • U3391 Ford Fusion Energi
  • U3391 Ford Fusion Hybrid
  • U3391 Ford Fusion Plug-In Hybrid
  • U3391 Ford GT
  • U3391 Ford Mustang
  • U3391 Ford Mustang Mach-E
  • U3391 Ford Mystique
  • U3391 Ford Probe
  • U3391 Ford Ranger
  • U3391 Ford Taurus
  • U3391 Ford Taurus X
  • U3391 Ford Tempo
  • U3391 Ford Thunderbird
  • U3391 Ford Transit
  • U3391 Ford Transit Connect
  • U3391 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.