U3987

U3987 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3987 Diagnosis

The axle lift 2 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for axle lift 2 air solenoid fault, and for air pressure switch short circuit fault.The ICU reads the wiper switch position and sends the status of the switch to the BHM. This fault becomes active when the ICU reads that both LO speed and HI speed are active at the same time.

The BHM measures the current on this circuit when the headlamp output is commanded ON. This fault indicates that the left high beam headlamp circuit is drawing more current than it is designed to supply and possibly there is a wiring fault shorting this circuit to ground.

Ford U3987 Fault Code Meaning :

Ford U3987 Symptoms :

Ford U3987 Reasons :

How To Fix Ford U3987 Trouble Code ?

Which Ford cars have the code U3987?

  • U3987 Ford Aerostar
  • U3987 Ford Bronco
  • U3987 Ford C-Max
  • U3987 Ford C-Max Energi
  • U3987 Ford C-Max Hybrid
  • U3987 Ford Contour
  • U3987 Ford Crown Victoria
  • U3987 Ford EcoSport
  • U3987 Ford Econoline
  • U3987 Ford Edge
  • U3987 Ford Escape
  • U3987 Ford Escape Hybrid
  • U3987 Ford Escort
  • U3987 Ford Everest
  • U3987 Ford Excursion
  • U3987 Ford Expedition
  • U3987 Ford Explorer
  • U3987 Ford Explorer Sport Trac
  • U3987 Ford F-150
  • U3987 Ford F-250
  • U3987 Ford F-350
  • U3987 Ford Fiesta
  • U3987 Ford Flex
  • U3987 Ford Focus
  • U3987 Ford Focus Electric
  • U3987 Ford Freestar
  • U3987 Ford Freestyle
  • U3987 Ford Fusion
  • U3987 Ford Fusion Energi
  • U3987 Ford Fusion Hybrid
  • U3987 Ford Fusion Plug-In Hybrid
  • U3987 Ford GT
  • U3987 Ford Mustang
  • U3987 Ford Mustang Mach-E
  • U3987 Ford Mystique
  • U3987 Ford Probe
  • U3987 Ford Ranger
  • U3987 Ford Taurus
  • U3987 Ford Taurus X
  • U3987 Ford Tempo
  • U3987 Ford Thunderbird
  • U3987 Ford Transit
  • U3987 Ford Transit Connect
  • U3987 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.