U3971

U3971 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3971 Diagnosis

The output circuits that are powered by VBAT3 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. The fuse in the main PDM powering this circuit may be open.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 End of Frame air output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for an End of Frame air solenoid fault, and for an air pressure switch short circuit fault.

Ford U3971 Fault Code Meaning :

Ford U3971 Symptoms :

Ford U3971 Reasons :

How To Fix Ford U3971 Trouble Code ?

Which Ford cars have the code U3971?

  • U3971 Ford Aerostar
  • U3971 Ford Bronco
  • U3971 Ford C-Max
  • U3971 Ford C-Max Energi
  • U3971 Ford C-Max Hybrid
  • U3971 Ford Contour
  • U3971 Ford Crown Victoria
  • U3971 Ford EcoSport
  • U3971 Ford Econoline
  • U3971 Ford Edge
  • U3971 Ford Escape
  • U3971 Ford Escape Hybrid
  • U3971 Ford Escort
  • U3971 Ford Everest
  • U3971 Ford Excursion
  • U3971 Ford Expedition
  • U3971 Ford Explorer
  • U3971 Ford Explorer Sport Trac
  • U3971 Ford F-150
  • U3971 Ford F-250
  • U3971 Ford F-350
  • U3971 Ford Fiesta
  • U3971 Ford Flex
  • U3971 Ford Focus
  • U3971 Ford Focus Electric
  • U3971 Ford Freestar
  • U3971 Ford Freestyle
  • U3971 Ford Fusion
  • U3971 Ford Fusion Energi
  • U3971 Ford Fusion Hybrid
  • U3971 Ford Fusion Plug-In Hybrid
  • U3971 Ford GT
  • U3971 Ford Mustang
  • U3971 Ford Mustang Mach-E
  • U3971 Ford Mystique
  • U3971 Ford Probe
  • U3971 Ford Ranger
  • U3971 Ford Taurus
  • U3971 Ford Taurus X
  • U3971 Ford Tempo
  • U3971 Ford Thunderbird
  • U3971 Ford Transit
  • U3971 Ford Transit Connect
  • U3971 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.