C0840

C0840 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C0840 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 top-of-clutch switch and bottom-of-clutch switch are both measured as closed at the same time. Troubleshoot for clutch switch shorted, or for a wiring fault between the clutch switch and the BHM.

Ford C0840 Fault Code Meaning :

Ford C0840 Symptoms :

Ford C0840 Reasons :

How To Fix Ford C0840 Trouble Code ?

Which Ford cars have the code C0840?

  • C0840 Ford Aerostar
  • C0840 Ford Bronco
  • C0840 Ford C-Max
  • C0840 Ford C-Max Energi
  • C0840 Ford C-Max Hybrid
  • C0840 Ford Contour
  • C0840 Ford Crown Victoria
  • C0840 Ford EcoSport
  • C0840 Ford Econoline
  • C0840 Ford Edge
  • C0840 Ford Escape
  • C0840 Ford Escape Hybrid
  • C0840 Ford Escort
  • C0840 Ford Everest
  • C0840 Ford Excursion
  • C0840 Ford Expedition
  • C0840 Ford Explorer
  • C0840 Ford Explorer Sport Trac
  • C0840 Ford F-150
  • C0840 Ford F-250
  • C0840 Ford F-350
  • C0840 Ford Fiesta
  • C0840 Ford Flex
  • C0840 Ford Focus
  • C0840 Ford Focus Electric
  • C0840 Ford Freestar
  • C0840 Ford Freestyle
  • C0840 Ford Fusion
  • C0840 Ford Fusion Energi
  • C0840 Ford Fusion Hybrid
  • C0840 Ford Fusion Plug-In Hybrid
  • C0840 Ford GT
  • C0840 Ford Mustang
  • C0840 Ford Mustang Mach-E
  • C0840 Ford Mystique
  • C0840 Ford Probe
  • C0840 Ford Ranger
  • C0840 Ford Taurus
  • C0840 Ford Taurus X
  • C0840 Ford Tempo
  • C0840 Ford Thunderbird
  • C0840 Ford Transit
  • C0840 Ford Transit Connect
  • C0840 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.