U3390

U3390 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3390 Diagnosis

This fault indicates that the circuit is drawing more current than it is designed to supply, and possibly there is a wiring fault shorting this circuit to ground. The fault remains active until the ignition is turned ON when the fault is no longer present.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 FF.

The BHM drives the 5 cab overhead clearance and ID lamps from connector B5 pin C on circuit 46. All other marker and tail lamps are driven from BHM connector B1,K on circuit 23. This circuit connects to the CHM as an input at connector J3,P.

Ford U3390 Fault Code Meaning :

Ford U3390 Symptoms :

Ford U3390 Reasons :

How To Fix Ford U3390 Trouble Code ?

Which Ford cars have the code U3390?

  • U3390 Ford Aerostar
  • U3390 Ford Bronco
  • U3390 Ford C-Max
  • U3390 Ford C-Max Energi
  • U3390 Ford C-Max Hybrid
  • U3390 Ford Contour
  • U3390 Ford Crown Victoria
  • U3390 Ford EcoSport
  • U3390 Ford Econoline
  • U3390 Ford Edge
  • U3390 Ford Escape
  • U3390 Ford Escape Hybrid
  • U3390 Ford Escort
  • U3390 Ford Everest
  • U3390 Ford Excursion
  • U3390 Ford Expedition
  • U3390 Ford Explorer
  • U3390 Ford Explorer Sport Trac
  • U3390 Ford F-150
  • U3390 Ford F-250
  • U3390 Ford F-350
  • U3390 Ford Fiesta
  • U3390 Ford Flex
  • U3390 Ford Focus
  • U3390 Ford Focus Electric
  • U3390 Ford Freestar
  • U3390 Ford Freestyle
  • U3390 Ford Fusion
  • U3390 Ford Fusion Energi
  • U3390 Ford Fusion Hybrid
  • U3390 Ford Fusion Plug-In Hybrid
  • U3390 Ford GT
  • U3390 Ford Mustang
  • U3390 Ford Mustang Mach-E
  • U3390 Ford Mystique
  • U3390 Ford Probe
  • U3390 Ford Ranger
  • U3390 Ford Taurus
  • U3390 Ford Taurus X
  • U3390 Ford Tempo
  • U3390 Ford Thunderbird
  • U3390 Ford Transit
  • U3390 Ford Transit Connect
  • U3390 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.