P9B78

P9B78 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P9B78 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 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 P9B78 Fault Code Meaning :

Ford P9B78 Symptoms :

Ford P9B78 Reasons :

How To Fix Ford P9B78 Trouble Code ?

Which Ford cars have the code P9B78?

  • P9B78 Ford Aerostar
  • P9B78 Ford Bronco
  • P9B78 Ford C-Max
  • P9B78 Ford C-Max Energi
  • P9B78 Ford C-Max Hybrid
  • P9B78 Ford Contour
  • P9B78 Ford Crown Victoria
  • P9B78 Ford EcoSport
  • P9B78 Ford Econoline
  • P9B78 Ford Edge
  • P9B78 Ford Escape
  • P9B78 Ford Escape Hybrid
  • P9B78 Ford Escort
  • P9B78 Ford Everest
  • P9B78 Ford Excursion
  • P9B78 Ford Expedition
  • P9B78 Ford Explorer
  • P9B78 Ford Explorer Sport Trac
  • P9B78 Ford F-150
  • P9B78 Ford F-250
  • P9B78 Ford F-350
  • P9B78 Ford Fiesta
  • P9B78 Ford Flex
  • P9B78 Ford Focus
  • P9B78 Ford Focus Electric
  • P9B78 Ford Freestar
  • P9B78 Ford Freestyle
  • P9B78 Ford Fusion
  • P9B78 Ford Fusion Energi
  • P9B78 Ford Fusion Hybrid
  • P9B78 Ford Fusion Plug-In Hybrid
  • P9B78 Ford GT
  • P9B78 Ford Mustang
  • P9B78 Ford Mustang Mach-E
  • P9B78 Ford Mystique
  • P9B78 Ford Probe
  • P9B78 Ford Ranger
  • P9B78 Ford Taurus
  • P9B78 Ford Taurus X
  • P9B78 Ford Tempo
  • P9B78 Ford Thunderbird
  • P9B78 Ford Transit
  • P9B78 Ford Transit Connect
  • P9B78 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.