P1840

P1840 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P1840 Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open circuit fault.The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for a wiring fault shorting this circuit to ground or for too many optional circuits spliced into it that is causing the BHM to turn it off.

When the engine is in higher engine speed and torque condition, the differential pressure over the DPF is expected to rise according to engine speed and torque. If the differential pressure exceeds a threshold then the differential pressure sensor plausibility DTC is set.

Ford P1840 Fault Code Meaning :

Ford P1840 Symptoms :

Ford P1840 Reasons :

How To Fix Ford P1840 Trouble Code ?

Which Ford cars have the code P1840?

  • P1840 Ford Aerostar
  • P1840 Ford Bronco
  • P1840 Ford C-Max
  • P1840 Ford C-Max Energi
  • P1840 Ford C-Max Hybrid
  • P1840 Ford Contour
  • P1840 Ford Crown Victoria
  • P1840 Ford EcoSport
  • P1840 Ford Econoline
  • P1840 Ford Edge
  • P1840 Ford Escape
  • P1840 Ford Escape Hybrid
  • P1840 Ford Escort
  • P1840 Ford Everest
  • P1840 Ford Excursion
  • P1840 Ford Expedition
  • P1840 Ford Explorer
  • P1840 Ford Explorer Sport Trac
  • P1840 Ford F-150
  • P1840 Ford F-250
  • P1840 Ford F-350
  • P1840 Ford Fiesta
  • P1840 Ford Flex
  • P1840 Ford Focus
  • P1840 Ford Focus Electric
  • P1840 Ford Freestar
  • P1840 Ford Freestyle
  • P1840 Ford Fusion
  • P1840 Ford Fusion Energi
  • P1840 Ford Fusion Hybrid
  • P1840 Ford Fusion Plug-In Hybrid
  • P1840 Ford GT
  • P1840 Ford Mustang
  • P1840 Ford Mustang Mach-E
  • P1840 Ford Mystique
  • P1840 Ford Probe
  • P1840 Ford Ranger
  • P1840 Ford Taurus
  • P1840 Ford Taurus X
  • P1840 Ford Tempo
  • P1840 Ford Thunderbird
  • P1840 Ford Transit
  • P1840 Ford Transit Connect
  • P1840 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.