P3A78

P3A78 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3A78 Diagnosis

The CHM does not suupport PWM type DRLs. The vehicle has a BHM mismatch with the CHM. Replace the CHM with one that is compatible with the BHM.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 P3A78 Fault Code Meaning :

Ford P3A78 Symptoms :

Ford P3A78 Reasons :

How To Fix Ford P3A78 Trouble Code ?

Which Ford cars have the code P3A78?

  • P3A78 Ford Aerostar
  • P3A78 Ford Bronco
  • P3A78 Ford C-Max
  • P3A78 Ford C-Max Energi
  • P3A78 Ford C-Max Hybrid
  • P3A78 Ford Contour
  • P3A78 Ford Crown Victoria
  • P3A78 Ford EcoSport
  • P3A78 Ford Econoline
  • P3A78 Ford Edge
  • P3A78 Ford Escape
  • P3A78 Ford Escape Hybrid
  • P3A78 Ford Escort
  • P3A78 Ford Everest
  • P3A78 Ford Excursion
  • P3A78 Ford Expedition
  • P3A78 Ford Explorer
  • P3A78 Ford Explorer Sport Trac
  • P3A78 Ford F-150
  • P3A78 Ford F-250
  • P3A78 Ford F-350
  • P3A78 Ford Fiesta
  • P3A78 Ford Flex
  • P3A78 Ford Focus
  • P3A78 Ford Focus Electric
  • P3A78 Ford Freestar
  • P3A78 Ford Freestyle
  • P3A78 Ford Fusion
  • P3A78 Ford Fusion Energi
  • P3A78 Ford Fusion Hybrid
  • P3A78 Ford Fusion Plug-In Hybrid
  • P3A78 Ford GT
  • P3A78 Ford Mustang
  • P3A78 Ford Mustang Mach-E
  • P3A78 Ford Mystique
  • P3A78 Ford Probe
  • P3A78 Ford Ranger
  • P3A78 Ford Taurus
  • P3A78 Ford Taurus X
  • P3A78 Ford Tempo
  • P3A78 Ford Thunderbird
  • P3A78 Ford Transit
  • P3A78 Ford Transit Connect
  • P3A78 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.