U3964

U3964 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3964 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 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 U3964 Fault Code Meaning :

Ford U3964 Symptoms :

Ford U3964 Reasons :

How To Fix Ford U3964 Trouble Code ?

Which Ford cars have the code U3964?

  • U3964 Ford Aerostar
  • U3964 Ford Bronco
  • U3964 Ford C-Max
  • U3964 Ford C-Max Energi
  • U3964 Ford C-Max Hybrid
  • U3964 Ford Contour
  • U3964 Ford Crown Victoria
  • U3964 Ford EcoSport
  • U3964 Ford Econoline
  • U3964 Ford Edge
  • U3964 Ford Escape
  • U3964 Ford Escape Hybrid
  • U3964 Ford Escort
  • U3964 Ford Everest
  • U3964 Ford Excursion
  • U3964 Ford Expedition
  • U3964 Ford Explorer
  • U3964 Ford Explorer Sport Trac
  • U3964 Ford F-150
  • U3964 Ford F-250
  • U3964 Ford F-350
  • U3964 Ford Fiesta
  • U3964 Ford Flex
  • U3964 Ford Focus
  • U3964 Ford Focus Electric
  • U3964 Ford Freestar
  • U3964 Ford Freestyle
  • U3964 Ford Fusion
  • U3964 Ford Fusion Energi
  • U3964 Ford Fusion Hybrid
  • U3964 Ford Fusion Plug-In Hybrid
  • U3964 Ford GT
  • U3964 Ford Mustang
  • U3964 Ford Mustang Mach-E
  • U3964 Ford Mystique
  • U3964 Ford Probe
  • U3964 Ford Ranger
  • U3964 Ford Taurus
  • U3964 Ford Taurus X
  • U3964 Ford Tempo
  • U3964 Ford Thunderbird
  • U3964 Ford Transit
  • U3964 Ford Transit Connect
  • U3964 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.