P78B9

P78B9 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P78B9 Diagnosis

The axle lift 2 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for axle lift 2 air solenoid fault, and for air pressure switch short 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.

The suspension proportioning output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for suspension proportioning air solenoid fault, and for air pressure switch short circuit fault.

Ford P78B9 Fault Code Meaning :

Ford P78B9 Symptoms :

Ford P78B9 Reasons :

How To Fix Ford P78B9 Trouble Code ?

Which Ford cars have the code P78B9?

  • P78B9 Ford Aerostar
  • P78B9 Ford Bronco
  • P78B9 Ford C-Max
  • P78B9 Ford C-Max Energi
  • P78B9 Ford C-Max Hybrid
  • P78B9 Ford Contour
  • P78B9 Ford Crown Victoria
  • P78B9 Ford EcoSport
  • P78B9 Ford Econoline
  • P78B9 Ford Edge
  • P78B9 Ford Escape
  • P78B9 Ford Escape Hybrid
  • P78B9 Ford Escort
  • P78B9 Ford Everest
  • P78B9 Ford Excursion
  • P78B9 Ford Expedition
  • P78B9 Ford Explorer
  • P78B9 Ford Explorer Sport Trac
  • P78B9 Ford F-150
  • P78B9 Ford F-250
  • P78B9 Ford F-350
  • P78B9 Ford Fiesta
  • P78B9 Ford Flex
  • P78B9 Ford Focus
  • P78B9 Ford Focus Electric
  • P78B9 Ford Freestar
  • P78B9 Ford Freestyle
  • P78B9 Ford Fusion
  • P78B9 Ford Fusion Energi
  • P78B9 Ford Fusion Hybrid
  • P78B9 Ford Fusion Plug-In Hybrid
  • P78B9 Ford GT
  • P78B9 Ford Mustang
  • P78B9 Ford Mustang Mach-E
  • P78B9 Ford Mystique
  • P78B9 Ford Probe
  • P78B9 Ford Ranger
  • P78B9 Ford Taurus
  • P78B9 Ford Taurus X
  • P78B9 Ford Tempo
  • P78B9 Ford Thunderbird
  • P78B9 Ford Transit
  • P78B9 Ford Transit Connect
  • P78B9 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.