P840B

P840B Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P840B 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.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 P840B Fault Code Meaning :

Ford P840B Symptoms :

Ford P840B Reasons :

How To Fix Ford P840B Trouble Code ?

Which Ford cars have the code P840B?

  • P840B Ford Aerostar
  • P840B Ford Bronco
  • P840B Ford C-Max
  • P840B Ford C-Max Energi
  • P840B Ford C-Max Hybrid
  • P840B Ford Contour
  • P840B Ford Crown Victoria
  • P840B Ford EcoSport
  • P840B Ford Econoline
  • P840B Ford Edge
  • P840B Ford Escape
  • P840B Ford Escape Hybrid
  • P840B Ford Escort
  • P840B Ford Everest
  • P840B Ford Excursion
  • P840B Ford Expedition
  • P840B Ford Explorer
  • P840B Ford Explorer Sport Trac
  • P840B Ford F-150
  • P840B Ford F-250
  • P840B Ford F-350
  • P840B Ford Fiesta
  • P840B Ford Flex
  • P840B Ford Focus
  • P840B Ford Focus Electric
  • P840B Ford Freestar
  • P840B Ford Freestyle
  • P840B Ford Fusion
  • P840B Ford Fusion Energi
  • P840B Ford Fusion Hybrid
  • P840B Ford Fusion Plug-In Hybrid
  • P840B Ford GT
  • P840B Ford Mustang
  • P840B Ford Mustang Mach-E
  • P840B Ford Mystique
  • P840B Ford Probe
  • P840B Ford Ranger
  • P840B Ford Taurus
  • P840B Ford Taurus X
  • P840B Ford Tempo
  • P840B Ford Thunderbird
  • P840B Ford Transit
  • P840B Ford Transit Connect
  • P840B 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.