U3989

U3989 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3989 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 position information for the switch becomes Not Available. Remove the duplicate Smart Switch, then use ServiceLink to verify that the correct Smart Switches are configured for the vehicle.

A comparison of pressures from all sensors is made. The smallest difference between the three is determined and a reference pressure is calculated. The Barometric pressure sensor value is compared to the reference value and if the difference is above the threshold a DTC is reported.

Ford U3989 Fault Code Meaning :

Ford U3989 Symptoms :

Ford U3989 Reasons :

How To Fix Ford U3989 Trouble Code ?

Which Ford cars have the code U3989?

  • U3989 Ford Aerostar
  • U3989 Ford Bronco
  • U3989 Ford C-Max
  • U3989 Ford C-Max Energi
  • U3989 Ford C-Max Hybrid
  • U3989 Ford Contour
  • U3989 Ford Crown Victoria
  • U3989 Ford EcoSport
  • U3989 Ford Econoline
  • U3989 Ford Edge
  • U3989 Ford Escape
  • U3989 Ford Escape Hybrid
  • U3989 Ford Escort
  • U3989 Ford Everest
  • U3989 Ford Excursion
  • U3989 Ford Expedition
  • U3989 Ford Explorer
  • U3989 Ford Explorer Sport Trac
  • U3989 Ford F-150
  • U3989 Ford F-250
  • U3989 Ford F-350
  • U3989 Ford Fiesta
  • U3989 Ford Flex
  • U3989 Ford Focus
  • U3989 Ford Focus Electric
  • U3989 Ford Freestar
  • U3989 Ford Freestyle
  • U3989 Ford Fusion
  • U3989 Ford Fusion Energi
  • U3989 Ford Fusion Hybrid
  • U3989 Ford Fusion Plug-In Hybrid
  • U3989 Ford GT
  • U3989 Ford Mustang
  • U3989 Ford Mustang Mach-E
  • U3989 Ford Mystique
  • U3989 Ford Probe
  • U3989 Ford Ranger
  • U3989 Ford Taurus
  • U3989 Ford Taurus X
  • U3989 Ford Tempo
  • U3989 Ford Thunderbird
  • U3989 Ford Transit
  • U3989 Ford Transit Connect
  • U3989 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.