C3840

C3840 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C3840 Diagnosis

The output circuits that are powered by VBAT2 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. 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 C3840 Fault Code Meaning :

Ford C3840 Symptoms :

Ford C3840 Reasons :

How To Fix Ford C3840 Trouble Code ?

Which Ford cars have the code C3840?

  • C3840 Ford Aerostar
  • C3840 Ford Bronco
  • C3840 Ford C-Max
  • C3840 Ford C-Max Energi
  • C3840 Ford C-Max Hybrid
  • C3840 Ford Contour
  • C3840 Ford Crown Victoria
  • C3840 Ford EcoSport
  • C3840 Ford Econoline
  • C3840 Ford Edge
  • C3840 Ford Escape
  • C3840 Ford Escape Hybrid
  • C3840 Ford Escort
  • C3840 Ford Everest
  • C3840 Ford Excursion
  • C3840 Ford Expedition
  • C3840 Ford Explorer
  • C3840 Ford Explorer Sport Trac
  • C3840 Ford F-150
  • C3840 Ford F-250
  • C3840 Ford F-350
  • C3840 Ford Fiesta
  • C3840 Ford Flex
  • C3840 Ford Focus
  • C3840 Ford Focus Electric
  • C3840 Ford Freestar
  • C3840 Ford Freestyle
  • C3840 Ford Fusion
  • C3840 Ford Fusion Energi
  • C3840 Ford Fusion Hybrid
  • C3840 Ford Fusion Plug-In Hybrid
  • C3840 Ford GT
  • C3840 Ford Mustang
  • C3840 Ford Mustang Mach-E
  • C3840 Ford Mystique
  • C3840 Ford Probe
  • C3840 Ford Ranger
  • C3840 Ford Taurus
  • C3840 Ford Taurus X
  • C3840 Ford Tempo
  • C3840 Ford Thunderbird
  • C3840 Ford Transit
  • C3840 Ford Transit Connect
  • C3840 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.