P3878

P3878 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3878 Diagnosis

The fuse in the main PDM powering this circuit may be open. The root cause could be excessive loads on an output, or a short to ground in the VBAT2 supply to the CHM.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 P3878 Fault Code Meaning :

Ford P3878 Symptoms :

Ford P3878 Reasons :

How To Fix Ford P3878 Trouble Code ?

Which Ford cars have the code P3878?

  • P3878 Ford Aerostar
  • P3878 Ford Bronco
  • P3878 Ford C-Max
  • P3878 Ford C-Max Energi
  • P3878 Ford C-Max Hybrid
  • P3878 Ford Contour
  • P3878 Ford Crown Victoria
  • P3878 Ford EcoSport
  • P3878 Ford Econoline
  • P3878 Ford Edge
  • P3878 Ford Escape
  • P3878 Ford Escape Hybrid
  • P3878 Ford Escort
  • P3878 Ford Everest
  • P3878 Ford Excursion
  • P3878 Ford Expedition
  • P3878 Ford Explorer
  • P3878 Ford Explorer Sport Trac
  • P3878 Ford F-150
  • P3878 Ford F-250
  • P3878 Ford F-350
  • P3878 Ford Fiesta
  • P3878 Ford Flex
  • P3878 Ford Focus
  • P3878 Ford Focus Electric
  • P3878 Ford Freestar
  • P3878 Ford Freestyle
  • P3878 Ford Fusion
  • P3878 Ford Fusion Energi
  • P3878 Ford Fusion Hybrid
  • P3878 Ford Fusion Plug-In Hybrid
  • P3878 Ford GT
  • P3878 Ford Mustang
  • P3878 Ford Mustang Mach-E
  • P3878 Ford Mystique
  • P3878 Ford Probe
  • P3878 Ford Ranger
  • P3878 Ford Taurus
  • P3878 Ford Taurus X
  • P3878 Ford Tempo
  • P3878 Ford Thunderbird
  • P3878 Ford Transit
  • P3878 Ford Transit Connect
  • P3878 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.