P840A

P840A Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P840A 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 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 FF.

The End of Frame air output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for an End of Frame air solenoid fault, and for an air pressure switch short circuit fault.

Ford P840A Fault Code Meaning :

Ford P840A Symptoms :

Ford P840A Reasons :

How To Fix Ford P840A Trouble Code ?

Which Ford cars have the code P840A?

  • P840A Ford Aerostar
  • P840A Ford Bronco
  • P840A Ford C-Max
  • P840A Ford C-Max Energi
  • P840A Ford C-Max Hybrid
  • P840A Ford Contour
  • P840A Ford Crown Victoria
  • P840A Ford EcoSport
  • P840A Ford Econoline
  • P840A Ford Edge
  • P840A Ford Escape
  • P840A Ford Escape Hybrid
  • P840A Ford Escort
  • P840A Ford Everest
  • P840A Ford Excursion
  • P840A Ford Expedition
  • P840A Ford Explorer
  • P840A Ford Explorer Sport Trac
  • P840A Ford F-150
  • P840A Ford F-250
  • P840A Ford F-350
  • P840A Ford Fiesta
  • P840A Ford Flex
  • P840A Ford Focus
  • P840A Ford Focus Electric
  • P840A Ford Freestar
  • P840A Ford Freestyle
  • P840A Ford Fusion
  • P840A Ford Fusion Energi
  • P840A Ford Fusion Hybrid
  • P840A Ford Fusion Plug-In Hybrid
  • P840A Ford GT
  • P840A Ford Mustang
  • P840A Ford Mustang Mach-E
  • P840A Ford Mystique
  • P840A Ford Probe
  • P840A Ford Ranger
  • P840A Ford Taurus
  • P840A Ford Taurus X
  • P840A Ford Tempo
  • P840A Ford Thunderbird
  • P840A Ford Transit
  • P840A Ford Transit Connect
  • P840A 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.