C3931

C3931 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C3931 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.Determine if the extra switch is not required for the vehicle or if the switch has been installed but the necessary reference parameter has not been programmed into the BHM.

The BHM measures the current on this circuit when the starter output is commanded ON. This fault indicates the magnetic switch or the wiring between the BHM and the magnetic switch is open circuit.

Ford C3931 Fault Code Meaning :

Ford C3931 Symptoms :

Ford C3931 Reasons :

How To Fix Ford C3931 Trouble Code ?

Which Ford cars have the code C3931?

  • C3931 Ford Aerostar
  • C3931 Ford Bronco
  • C3931 Ford C-Max
  • C3931 Ford C-Max Energi
  • C3931 Ford C-Max Hybrid
  • C3931 Ford Contour
  • C3931 Ford Crown Victoria
  • C3931 Ford EcoSport
  • C3931 Ford Econoline
  • C3931 Ford Edge
  • C3931 Ford Escape
  • C3931 Ford Escape Hybrid
  • C3931 Ford Escort
  • C3931 Ford Everest
  • C3931 Ford Excursion
  • C3931 Ford Expedition
  • C3931 Ford Explorer
  • C3931 Ford Explorer Sport Trac
  • C3931 Ford F-150
  • C3931 Ford F-250
  • C3931 Ford F-350
  • C3931 Ford Fiesta
  • C3931 Ford Flex
  • C3931 Ford Focus
  • C3931 Ford Focus Electric
  • C3931 Ford Freestar
  • C3931 Ford Freestyle
  • C3931 Ford Fusion
  • C3931 Ford Fusion Energi
  • C3931 Ford Fusion Hybrid
  • C3931 Ford Fusion Plug-In Hybrid
  • C3931 Ford GT
  • C3931 Ford Mustang
  • C3931 Ford Mustang Mach-E
  • C3931 Ford Mystique
  • C3931 Ford Probe
  • C3931 Ford Ranger
  • C3931 Ford Taurus
  • C3931 Ford Taurus X
  • C3931 Ford Tempo
  • C3931 Ford Thunderbird
  • C3931 Ford Transit
  • C3931 Ford Transit Connect
  • C3931 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.