B3878

B3878 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B3878 Diagnosis

The output circuits that are powered by VBAT2 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. 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.

When the engine is in higher engine speed and torque condition, the differential pressure over the DPF is expected to rise according to engine speed and torque. If the differential pressure exceeds a threshold then the differential pressure sensor plausibility DTC is set.

Ford B3878 Fault Code Meaning :

Ford B3878 Symptoms :

Ford B3878 Reasons :

How To Fix Ford B3878 Trouble Code ?

Which Ford cars have the code B3878?

  • B3878 Ford Aerostar
  • B3878 Ford Bronco
  • B3878 Ford C-Max
  • B3878 Ford C-Max Energi
  • B3878 Ford C-Max Hybrid
  • B3878 Ford Contour
  • B3878 Ford Crown Victoria
  • B3878 Ford EcoSport
  • B3878 Ford Econoline
  • B3878 Ford Edge
  • B3878 Ford Escape
  • B3878 Ford Escape Hybrid
  • B3878 Ford Escort
  • B3878 Ford Everest
  • B3878 Ford Excursion
  • B3878 Ford Expedition
  • B3878 Ford Explorer
  • B3878 Ford Explorer Sport Trac
  • B3878 Ford F-150
  • B3878 Ford F-250
  • B3878 Ford F-350
  • B3878 Ford Fiesta
  • B3878 Ford Flex
  • B3878 Ford Focus
  • B3878 Ford Focus Electric
  • B3878 Ford Freestar
  • B3878 Ford Freestyle
  • B3878 Ford Fusion
  • B3878 Ford Fusion Energi
  • B3878 Ford Fusion Hybrid
  • B3878 Ford Fusion Plug-In Hybrid
  • B3878 Ford GT
  • B3878 Ford Mustang
  • B3878 Ford Mustang Mach-E
  • B3878 Ford Mystique
  • B3878 Ford Probe
  • B3878 Ford Ranger
  • B3878 Ford Taurus
  • B3878 Ford Taurus X
  • B3878 Ford Tempo
  • B3878 Ford Thunderbird
  • B3878 Ford Transit
  • B3878 Ford Transit Connect
  • B3878 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.