P3840

P3840 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3840 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 P3840 Fault Code Meaning :

Ford P3840 Symptoms :

Ford P3840 Reasons :

How To Fix Ford P3840 Trouble Code ?

Which Ford cars have the code P3840?

  • P3840 Ford Aerostar
  • P3840 Ford Bronco
  • P3840 Ford C-Max
  • P3840 Ford C-Max Energi
  • P3840 Ford C-Max Hybrid
  • P3840 Ford Contour
  • P3840 Ford Crown Victoria
  • P3840 Ford EcoSport
  • P3840 Ford Econoline
  • P3840 Ford Edge
  • P3840 Ford Escape
  • P3840 Ford Escape Hybrid
  • P3840 Ford Escort
  • P3840 Ford Everest
  • P3840 Ford Excursion
  • P3840 Ford Expedition
  • P3840 Ford Explorer
  • P3840 Ford Explorer Sport Trac
  • P3840 Ford F-150
  • P3840 Ford F-250
  • P3840 Ford F-350
  • P3840 Ford Fiesta
  • P3840 Ford Flex
  • P3840 Ford Focus
  • P3840 Ford Focus Electric
  • P3840 Ford Freestar
  • P3840 Ford Freestyle
  • P3840 Ford Fusion
  • P3840 Ford Fusion Energi
  • P3840 Ford Fusion Hybrid
  • P3840 Ford Fusion Plug-In Hybrid
  • P3840 Ford GT
  • P3840 Ford Mustang
  • P3840 Ford Mustang Mach-E
  • P3840 Ford Mystique
  • P3840 Ford Probe
  • P3840 Ford Ranger
  • P3840 Ford Taurus
  • P3840 Ford Taurus X
  • P3840 Ford Tempo
  • P3840 Ford Thunderbird
  • P3840 Ford Transit
  • P3840 Ford Transit Connect
  • P3840 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.