P3791

P3791 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3791 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 position information for the switch becomes Not Available. Remove the duplicate Smart Switch, then use ServiceLink to verify that the correct Smart Switches are configured for the vehicle.

A comparison of pressures from all sensors is made. The smallest difference between the three is determined and a reference pressure is calculated. The Barometric pressure sensor value is compared to the reference value and if the difference is above the threshold a DTC is reported.

Ford P3791 Fault Code Meaning :

Ford P3791 Symptoms :

Ford P3791 Reasons :

How To Fix Ford P3791 Trouble Code ?

Which Ford cars have the code P3791?

  • P3791 Ford Aerostar
  • P3791 Ford Bronco
  • P3791 Ford C-Max
  • P3791 Ford C-Max Energi
  • P3791 Ford C-Max Hybrid
  • P3791 Ford Contour
  • P3791 Ford Crown Victoria
  • P3791 Ford EcoSport
  • P3791 Ford Econoline
  • P3791 Ford Edge
  • P3791 Ford Escape
  • P3791 Ford Escape Hybrid
  • P3791 Ford Escort
  • P3791 Ford Everest
  • P3791 Ford Excursion
  • P3791 Ford Expedition
  • P3791 Ford Explorer
  • P3791 Ford Explorer Sport Trac
  • P3791 Ford F-150
  • P3791 Ford F-250
  • P3791 Ford F-350
  • P3791 Ford Fiesta
  • P3791 Ford Flex
  • P3791 Ford Focus
  • P3791 Ford Focus Electric
  • P3791 Ford Freestar
  • P3791 Ford Freestyle
  • P3791 Ford Fusion
  • P3791 Ford Fusion Energi
  • P3791 Ford Fusion Hybrid
  • P3791 Ford Fusion Plug-In Hybrid
  • P3791 Ford GT
  • P3791 Ford Mustang
  • P3791 Ford Mustang Mach-E
  • P3791 Ford Mystique
  • P3791 Ford Probe
  • P3791 Ford Ranger
  • P3791 Ford Taurus
  • P3791 Ford Taurus X
  • P3791 Ford Tempo
  • P3791 Ford Thunderbird
  • P3791 Ford Transit
  • P3791 Ford Transit Connect
  • P3791 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.