P78A1

P78A1 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P78A1 Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open circuit fault.The BHM is detecting more than one smart switch with the same ID number present on the vehicle. The outputs controlled by the switch and the indicator in the switch are commanded FF.

The End of Frame air output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for an End of Frame air solenoid fault, and for an air pressure switch short circuit fault.

Ford P78A1 Fault Code Meaning :

Ford P78A1 Symptoms :

Ford P78A1 Reasons :

How To Fix Ford P78A1 Trouble Code ?

Which Ford cars have the code P78A1?

  • P78A1 Ford Aerostar
  • P78A1 Ford Bronco
  • P78A1 Ford C-Max
  • P78A1 Ford C-Max Energi
  • P78A1 Ford C-Max Hybrid
  • P78A1 Ford Contour
  • P78A1 Ford Crown Victoria
  • P78A1 Ford EcoSport
  • P78A1 Ford Econoline
  • P78A1 Ford Edge
  • P78A1 Ford Escape
  • P78A1 Ford Escape Hybrid
  • P78A1 Ford Escort
  • P78A1 Ford Everest
  • P78A1 Ford Excursion
  • P78A1 Ford Expedition
  • P78A1 Ford Explorer
  • P78A1 Ford Explorer Sport Trac
  • P78A1 Ford F-150
  • P78A1 Ford F-250
  • P78A1 Ford F-350
  • P78A1 Ford Fiesta
  • P78A1 Ford Flex
  • P78A1 Ford Focus
  • P78A1 Ford Focus Electric
  • P78A1 Ford Freestar
  • P78A1 Ford Freestyle
  • P78A1 Ford Fusion
  • P78A1 Ford Fusion Energi
  • P78A1 Ford Fusion Hybrid
  • P78A1 Ford Fusion Plug-In Hybrid
  • P78A1 Ford GT
  • P78A1 Ford Mustang
  • P78A1 Ford Mustang Mach-E
  • P78A1 Ford Mystique
  • P78A1 Ford Probe
  • P78A1 Ford Ranger
  • P78A1 Ford Taurus
  • P78A1 Ford Taurus X
  • P78A1 Ford Tempo
  • P78A1 Ford Thunderbird
  • P78A1 Ford Transit
  • P78A1 Ford Transit Connect
  • P78A1 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.