P91F9

P91F9 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P91F9 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 P91F9 Fault Code Meaning :

Ford P91F9 Symptoms :

Ford P91F9 Reasons :

How To Fix Ford P91F9 Trouble Code ?

Which Ford cars have the code P91F9?

  • P91F9 Ford Aerostar
  • P91F9 Ford Bronco
  • P91F9 Ford C-Max
  • P91F9 Ford C-Max Energi
  • P91F9 Ford C-Max Hybrid
  • P91F9 Ford Contour
  • P91F9 Ford Crown Victoria
  • P91F9 Ford EcoSport
  • P91F9 Ford Econoline
  • P91F9 Ford Edge
  • P91F9 Ford Escape
  • P91F9 Ford Escape Hybrid
  • P91F9 Ford Escort
  • P91F9 Ford Everest
  • P91F9 Ford Excursion
  • P91F9 Ford Expedition
  • P91F9 Ford Explorer
  • P91F9 Ford Explorer Sport Trac
  • P91F9 Ford F-150
  • P91F9 Ford F-250
  • P91F9 Ford F-350
  • P91F9 Ford Fiesta
  • P91F9 Ford Flex
  • P91F9 Ford Focus
  • P91F9 Ford Focus Electric
  • P91F9 Ford Freestar
  • P91F9 Ford Freestyle
  • P91F9 Ford Fusion
  • P91F9 Ford Fusion Energi
  • P91F9 Ford Fusion Hybrid
  • P91F9 Ford Fusion Plug-In Hybrid
  • P91F9 Ford GT
  • P91F9 Ford Mustang
  • P91F9 Ford Mustang Mach-E
  • P91F9 Ford Mystique
  • P91F9 Ford Probe
  • P91F9 Ford Ranger
  • P91F9 Ford Taurus
  • P91F9 Ford Taurus X
  • P91F9 Ford Tempo
  • P91F9 Ford Thunderbird
  • P91F9 Ford Transit
  • P91F9 Ford Transit Connect
  • P91F9 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.