P3931

P3931 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3931 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 position information for the switch becomes Not Available. Remove the duplicate Smart Switch, then use ServiceLink to verify that the correct Smart Switches are configured for the vehicle.

A comparison of pressures from all sensors is made. The smallest difference between the three is determined and a reference pressure is calculated. The Barometric pressure sensor value is compared to the reference value and if the difference is above the threshold a DTC is reported.

Ford P3931 Fault Code Meaning :

Ford P3931 Symptoms :

Ford P3931 Reasons :

How To Fix Ford P3931 Trouble Code ?

Which Ford cars have the code P3931?

  • P3931 Ford Aerostar
  • P3931 Ford Bronco
  • P3931 Ford C-Max
  • P3931 Ford C-Max Energi
  • P3931 Ford C-Max Hybrid
  • P3931 Ford Contour
  • P3931 Ford Crown Victoria
  • P3931 Ford EcoSport
  • P3931 Ford Econoline
  • P3931 Ford Edge
  • P3931 Ford Escape
  • P3931 Ford Escape Hybrid
  • P3931 Ford Escort
  • P3931 Ford Everest
  • P3931 Ford Excursion
  • P3931 Ford Expedition
  • P3931 Ford Explorer
  • P3931 Ford Explorer Sport Trac
  • P3931 Ford F-150
  • P3931 Ford F-250
  • P3931 Ford F-350
  • P3931 Ford Fiesta
  • P3931 Ford Flex
  • P3931 Ford Focus
  • P3931 Ford Focus Electric
  • P3931 Ford Freestar
  • P3931 Ford Freestyle
  • P3931 Ford Fusion
  • P3931 Ford Fusion Energi
  • P3931 Ford Fusion Hybrid
  • P3931 Ford Fusion Plug-In Hybrid
  • P3931 Ford GT
  • P3931 Ford Mustang
  • P3931 Ford Mustang Mach-E
  • P3931 Ford Mystique
  • P3931 Ford Probe
  • P3931 Ford Ranger
  • P3931 Ford Taurus
  • P3931 Ford Taurus X
  • P3931 Ford Tempo
  • P3931 Ford Thunderbird
  • P3931 Ford Transit
  • P3931 Ford Transit Connect
  • P3931 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.