C3994

C3994 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C3994 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.

This circuit connects to the CHM as an input at connector J3,P. The CHM passes the signal through to power the tail lamps and marker lamps from connector C2 pin G and also from connector C1 pins D, E, and F.

Ford C3994 Fault Code Meaning :

Ford C3994 Symptoms :

Ford C3994 Reasons :

How To Fix Ford C3994 Trouble Code ?

Which Ford cars have the code C3994?

  • C3994 Ford Aerostar
  • C3994 Ford Bronco
  • C3994 Ford C-Max
  • C3994 Ford C-Max Energi
  • C3994 Ford C-Max Hybrid
  • C3994 Ford Contour
  • C3994 Ford Crown Victoria
  • C3994 Ford EcoSport
  • C3994 Ford Econoline
  • C3994 Ford Edge
  • C3994 Ford Escape
  • C3994 Ford Escape Hybrid
  • C3994 Ford Escort
  • C3994 Ford Everest
  • C3994 Ford Excursion
  • C3994 Ford Expedition
  • C3994 Ford Explorer
  • C3994 Ford Explorer Sport Trac
  • C3994 Ford F-150
  • C3994 Ford F-250
  • C3994 Ford F-350
  • C3994 Ford Fiesta
  • C3994 Ford Flex
  • C3994 Ford Focus
  • C3994 Ford Focus Electric
  • C3994 Ford Freestar
  • C3994 Ford Freestyle
  • C3994 Ford Fusion
  • C3994 Ford Fusion Energi
  • C3994 Ford Fusion Hybrid
  • C3994 Ford Fusion Plug-In Hybrid
  • C3994 Ford GT
  • C3994 Ford Mustang
  • C3994 Ford Mustang Mach-E
  • C3994 Ford Mystique
  • C3994 Ford Probe
  • C3994 Ford Ranger
  • C3994 Ford Taurus
  • C3994 Ford Taurus X
  • C3994 Ford Tempo
  • C3994 Ford Thunderbird
  • C3994 Ford Transit
  • C3994 Ford Transit Connect
  • C3994 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.