P4D78

P4D78 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P4D78 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.Determine if the extra switch is not required for the vehicle or if the switch has been installed but the necessary reference parameter has not been programmed into the BHM.

The BHM measures the current on this circuit when the starter output is commanded ON. This fault indicates the magnetic switch or the wiring between the BHM and the magnetic switch is open circuit.

Ford P4D78 Fault Code Meaning :

Ford P4D78 Symptoms :

Ford P4D78 Reasons :

How To Fix Ford P4D78 Trouble Code ?

Which Ford cars have the code P4D78?

  • P4D78 Ford Aerostar
  • P4D78 Ford Bronco
  • P4D78 Ford C-Max
  • P4D78 Ford C-Max Energi
  • P4D78 Ford C-Max Hybrid
  • P4D78 Ford Contour
  • P4D78 Ford Crown Victoria
  • P4D78 Ford EcoSport
  • P4D78 Ford Econoline
  • P4D78 Ford Edge
  • P4D78 Ford Escape
  • P4D78 Ford Escape Hybrid
  • P4D78 Ford Escort
  • P4D78 Ford Everest
  • P4D78 Ford Excursion
  • P4D78 Ford Expedition
  • P4D78 Ford Explorer
  • P4D78 Ford Explorer Sport Trac
  • P4D78 Ford F-150
  • P4D78 Ford F-250
  • P4D78 Ford F-350
  • P4D78 Ford Fiesta
  • P4D78 Ford Flex
  • P4D78 Ford Focus
  • P4D78 Ford Focus Electric
  • P4D78 Ford Freestar
  • P4D78 Ford Freestyle
  • P4D78 Ford Fusion
  • P4D78 Ford Fusion Energi
  • P4D78 Ford Fusion Hybrid
  • P4D78 Ford Fusion Plug-In Hybrid
  • P4D78 Ford GT
  • P4D78 Ford Mustang
  • P4D78 Ford Mustang Mach-E
  • P4D78 Ford Mystique
  • P4D78 Ford Probe
  • P4D78 Ford Ranger
  • P4D78 Ford Taurus
  • P4D78 Ford Taurus X
  • P4D78 Ford Tempo
  • P4D78 Ford Thunderbird
  • P4D78 Ford Transit
  • P4D78 Ford Transit Connect
  • P4D78 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.