P51C9

P51C9 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P51C9 Diagnosis

The PTO 1 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for PTO 2 air solenoid fault, and for air pressure switch short circuit fault.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 P51C9 Fault Code Meaning :

Ford P51C9 Symptoms :

Ford P51C9 Reasons :

How To Fix Ford P51C9 Trouble Code ?

Which Ford cars have the code P51C9?

  • P51C9 Ford Aerostar
  • P51C9 Ford Bronco
  • P51C9 Ford C-Max
  • P51C9 Ford C-Max Energi
  • P51C9 Ford C-Max Hybrid
  • P51C9 Ford Contour
  • P51C9 Ford Crown Victoria
  • P51C9 Ford EcoSport
  • P51C9 Ford Econoline
  • P51C9 Ford Edge
  • P51C9 Ford Escape
  • P51C9 Ford Escape Hybrid
  • P51C9 Ford Escort
  • P51C9 Ford Everest
  • P51C9 Ford Excursion
  • P51C9 Ford Expedition
  • P51C9 Ford Explorer
  • P51C9 Ford Explorer Sport Trac
  • P51C9 Ford F-150
  • P51C9 Ford F-250
  • P51C9 Ford F-350
  • P51C9 Ford Fiesta
  • P51C9 Ford Flex
  • P51C9 Ford Focus
  • P51C9 Ford Focus Electric
  • P51C9 Ford Freestar
  • P51C9 Ford Freestyle
  • P51C9 Ford Fusion
  • P51C9 Ford Fusion Energi
  • P51C9 Ford Fusion Hybrid
  • P51C9 Ford Fusion Plug-In Hybrid
  • P51C9 Ford GT
  • P51C9 Ford Mustang
  • P51C9 Ford Mustang Mach-E
  • P51C9 Ford Mystique
  • P51C9 Ford Probe
  • P51C9 Ford Ranger
  • P51C9 Ford Taurus
  • P51C9 Ford Taurus X
  • P51C9 Ford Tempo
  • P51C9 Ford Thunderbird
  • P51C9 Ford Transit
  • P51C9 Ford Transit Connect
  • P51C9 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.