P4F91

P4F91 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P4F91 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 P4F91 Fault Code Meaning :

Ford P4F91 Symptoms :

Ford P4F91 Reasons :

How To Fix Ford P4F91 Trouble Code ?

Which Ford cars have the code P4F91?

  • P4F91 Ford Aerostar
  • P4F91 Ford Bronco
  • P4F91 Ford C-Max
  • P4F91 Ford C-Max Energi
  • P4F91 Ford C-Max Hybrid
  • P4F91 Ford Contour
  • P4F91 Ford Crown Victoria
  • P4F91 Ford EcoSport
  • P4F91 Ford Econoline
  • P4F91 Ford Edge
  • P4F91 Ford Escape
  • P4F91 Ford Escape Hybrid
  • P4F91 Ford Escort
  • P4F91 Ford Everest
  • P4F91 Ford Excursion
  • P4F91 Ford Expedition
  • P4F91 Ford Explorer
  • P4F91 Ford Explorer Sport Trac
  • P4F91 Ford F-150
  • P4F91 Ford F-250
  • P4F91 Ford F-350
  • P4F91 Ford Fiesta
  • P4F91 Ford Flex
  • P4F91 Ford Focus
  • P4F91 Ford Focus Electric
  • P4F91 Ford Freestar
  • P4F91 Ford Freestyle
  • P4F91 Ford Fusion
  • P4F91 Ford Fusion Energi
  • P4F91 Ford Fusion Hybrid
  • P4F91 Ford Fusion Plug-In Hybrid
  • P4F91 Ford GT
  • P4F91 Ford Mustang
  • P4F91 Ford Mustang Mach-E
  • P4F91 Ford Mystique
  • P4F91 Ford Probe
  • P4F91 Ford Ranger
  • P4F91 Ford Taurus
  • P4F91 Ford Taurus X
  • P4F91 Ford Tempo
  • P4F91 Ford Thunderbird
  • P4F91 Ford Transit
  • P4F91 Ford Transit Connect
  • P4F91 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.