P4B78
P4B78 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.P4B78 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 OFF.
The disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.
Ford P4B78 Fault Code Meaning :
Ford P4B78 Symptoms :
Ford P4B78 Reasons :
How To Fix Ford P4B78 Trouble Code ?
Which Ford cars have the code P4B78?
- P4B78 Ford Aerostar
- P4B78 Ford Bronco
- P4B78 Ford C-Max
- P4B78 Ford C-Max Energi
- P4B78 Ford C-Max Hybrid
- P4B78 Ford Contour
- P4B78 Ford Crown Victoria
- P4B78 Ford EcoSport
- P4B78 Ford Econoline
- P4B78 Ford Edge
- P4B78 Ford Escape
- P4B78 Ford Escape Hybrid
- P4B78 Ford Escort
- P4B78 Ford Everest
- P4B78 Ford Excursion
- P4B78 Ford Expedition
- P4B78 Ford Explorer
- P4B78 Ford Explorer Sport Trac
- P4B78 Ford F-150
- P4B78 Ford F-250
- P4B78 Ford F-350
- P4B78 Ford Fiesta
- P4B78 Ford Flex
- P4B78 Ford Focus
- P4B78 Ford Focus Electric
- P4B78 Ford Freestar
- P4B78 Ford Freestyle
- P4B78 Ford Fusion
- P4B78 Ford Fusion Energi
- P4B78 Ford Fusion Hybrid
- P4B78 Ford Fusion Plug-In Hybrid
- P4B78 Ford GT
- P4B78 Ford Mustang
- P4B78 Ford Mustang Mach-E
- P4B78 Ford Mystique
- P4B78 Ford Probe
- P4B78 Ford Ranger
- P4B78 Ford Taurus
- P4B78 Ford Taurus X
- P4B78 Ford Tempo
- P4B78 Ford Thunderbird
- P4B78 Ford Transit
- P4B78 Ford Transit Connect
- P4B78 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.