P5A78

P5A78 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P5A78 Diagnosis

The fault remains active until the ignition is turned ON when the fault is no longer present. Some BHM configurations force this circuit off until the ignition switch is cycled.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 P5A78 Fault Code Meaning :

Ford P5A78 Symptoms :

Ford P5A78 Reasons :

How To Fix Ford P5A78 Trouble Code ?

Which Ford cars have the code P5A78?

  • P5A78 Ford Aerostar
  • P5A78 Ford Bronco
  • P5A78 Ford C-Max
  • P5A78 Ford C-Max Energi
  • P5A78 Ford C-Max Hybrid
  • P5A78 Ford Contour
  • P5A78 Ford Crown Victoria
  • P5A78 Ford EcoSport
  • P5A78 Ford Econoline
  • P5A78 Ford Edge
  • P5A78 Ford Escape
  • P5A78 Ford Escape Hybrid
  • P5A78 Ford Escort
  • P5A78 Ford Everest
  • P5A78 Ford Excursion
  • P5A78 Ford Expedition
  • P5A78 Ford Explorer
  • P5A78 Ford Explorer Sport Trac
  • P5A78 Ford F-150
  • P5A78 Ford F-250
  • P5A78 Ford F-350
  • P5A78 Ford Fiesta
  • P5A78 Ford Flex
  • P5A78 Ford Focus
  • P5A78 Ford Focus Electric
  • P5A78 Ford Freestar
  • P5A78 Ford Freestyle
  • P5A78 Ford Fusion
  • P5A78 Ford Fusion Energi
  • P5A78 Ford Fusion Hybrid
  • P5A78 Ford Fusion Plug-In Hybrid
  • P5A78 Ford GT
  • P5A78 Ford Mustang
  • P5A78 Ford Mustang Mach-E
  • P5A78 Ford Mystique
  • P5A78 Ford Probe
  • P5A78 Ford Ranger
  • P5A78 Ford Taurus
  • P5A78 Ford Taurus X
  • P5A78 Ford Tempo
  • P5A78 Ford Thunderbird
  • P5A78 Ford Transit
  • P5A78 Ford Transit Connect
  • P5A78 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.