U3998

U3998 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3998 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 supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for a wiring fault shorting this circuit to ground or for too many optional circuits spliced into it that is causing the BHM to turn it off.

The suspension proportioning output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for suspension proportioning air solenoid fault, and for air pressure switch short circuit fault.

Ford U3998 Fault Code Meaning :

Ford U3998 Symptoms :

Ford U3998 Reasons :

How To Fix Ford U3998 Trouble Code ?

Which Ford cars have the code U3998?

  • U3998 Ford Aerostar
  • U3998 Ford Bronco
  • U3998 Ford C-Max
  • U3998 Ford C-Max Energi
  • U3998 Ford C-Max Hybrid
  • U3998 Ford Contour
  • U3998 Ford Crown Victoria
  • U3998 Ford EcoSport
  • U3998 Ford Econoline
  • U3998 Ford Edge
  • U3998 Ford Escape
  • U3998 Ford Escape Hybrid
  • U3998 Ford Escort
  • U3998 Ford Everest
  • U3998 Ford Excursion
  • U3998 Ford Expedition
  • U3998 Ford Explorer
  • U3998 Ford Explorer Sport Trac
  • U3998 Ford F-150
  • U3998 Ford F-250
  • U3998 Ford F-350
  • U3998 Ford Fiesta
  • U3998 Ford Flex
  • U3998 Ford Focus
  • U3998 Ford Focus Electric
  • U3998 Ford Freestar
  • U3998 Ford Freestyle
  • U3998 Ford Fusion
  • U3998 Ford Fusion Energi
  • U3998 Ford Fusion Hybrid
  • U3998 Ford Fusion Plug-In Hybrid
  • U3998 Ford GT
  • U3998 Ford Mustang
  • U3998 Ford Mustang Mach-E
  • U3998 Ford Mystique
  • U3998 Ford Probe
  • U3998 Ford Ranger
  • U3998 Ford Taurus
  • U3998 Ford Taurus X
  • U3998 Ford Tempo
  • U3998 Ford Thunderbird
  • U3998 Ford Transit
  • U3998 Ford Transit Connect
  • U3998 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.