B3931

B3931 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B3931 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 is detecting more than one smart switch with the same ID number present on the vehicle. The outputs controlled by the switch and the indicator in the switch are commanded OFF.

The disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.

Ford B3931 Fault Code Meaning :

Ford B3931 Symptoms :

Ford B3931 Reasons :

How To Fix Ford B3931 Trouble Code ?

Which Ford cars have the code B3931?

  • B3931 Ford Aerostar
  • B3931 Ford Bronco
  • B3931 Ford C-Max
  • B3931 Ford C-Max Energi
  • B3931 Ford C-Max Hybrid
  • B3931 Ford Contour
  • B3931 Ford Crown Victoria
  • B3931 Ford EcoSport
  • B3931 Ford Econoline
  • B3931 Ford Edge
  • B3931 Ford Escape
  • B3931 Ford Escape Hybrid
  • B3931 Ford Escort
  • B3931 Ford Everest
  • B3931 Ford Excursion
  • B3931 Ford Expedition
  • B3931 Ford Explorer
  • B3931 Ford Explorer Sport Trac
  • B3931 Ford F-150
  • B3931 Ford F-250
  • B3931 Ford F-350
  • B3931 Ford Fiesta
  • B3931 Ford Flex
  • B3931 Ford Focus
  • B3931 Ford Focus Electric
  • B3931 Ford Freestar
  • B3931 Ford Freestyle
  • B3931 Ford Fusion
  • B3931 Ford Fusion Energi
  • B3931 Ford Fusion Hybrid
  • B3931 Ford Fusion Plug-In Hybrid
  • B3931 Ford GT
  • B3931 Ford Mustang
  • B3931 Ford Mustang Mach-E
  • B3931 Ford Mystique
  • B3931 Ford Probe
  • B3931 Ford Ranger
  • B3931 Ford Taurus
  • B3931 Ford Taurus X
  • B3931 Ford Tempo
  • B3931 Ford Thunderbird
  • B3931 Ford Transit
  • B3931 Ford Transit Connect
  • B3931 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.