P3990

P3990 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3990 Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open circuit fault.Determine if the extra switch is not required for the vehicle or if the switch has been installed but the necessary reference parameter has not been programmed into the BHM.

The BHM measures the current on this circuit when the starter output is commanded ON. This fault indicates the magnetic switch or the wiring between the BHM and the magnetic switch is open circuit.

Ford P3990 Fault Code Meaning :

Ford P3990 Symptoms :

Ford P3990 Reasons :

How To Fix Ford P3990 Trouble Code ?

Which Ford cars have the code P3990?

  • P3990 Ford Aerostar
  • P3990 Ford Bronco
  • P3990 Ford C-Max
  • P3990 Ford C-Max Energi
  • P3990 Ford C-Max Hybrid
  • P3990 Ford Contour
  • P3990 Ford Crown Victoria
  • P3990 Ford EcoSport
  • P3990 Ford Econoline
  • P3990 Ford Edge
  • P3990 Ford Escape
  • P3990 Ford Escape Hybrid
  • P3990 Ford Escort
  • P3990 Ford Everest
  • P3990 Ford Excursion
  • P3990 Ford Expedition
  • P3990 Ford Explorer
  • P3990 Ford Explorer Sport Trac
  • P3990 Ford F-150
  • P3990 Ford F-250
  • P3990 Ford F-350
  • P3990 Ford Fiesta
  • P3990 Ford Flex
  • P3990 Ford Focus
  • P3990 Ford Focus Electric
  • P3990 Ford Freestar
  • P3990 Ford Freestyle
  • P3990 Ford Fusion
  • P3990 Ford Fusion Energi
  • P3990 Ford Fusion Hybrid
  • P3990 Ford Fusion Plug-In Hybrid
  • P3990 Ford GT
  • P3990 Ford Mustang
  • P3990 Ford Mustang Mach-E
  • P3990 Ford Mystique
  • P3990 Ford Probe
  • P3990 Ford Ranger
  • P3990 Ford Taurus
  • P3990 Ford Taurus X
  • P3990 Ford Tempo
  • P3990 Ford Thunderbird
  • P3990 Ford Transit
  • P3990 Ford Transit Connect
  • P3990 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.