B0378

B0378 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B0378 Diagnosis

This fault indicates that the circuit is drawing more current than it is designed to supply, and possibly there is a wiring fault shorting this circuit to ground. The fault remains active until the ignition is turned ON when the fault is no longer present.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.

This circuit connects to the CHM as an input at connector J3,P. The CHM passes the signal through to power the tail lamps and marker lamps from connector C2 pin G and also from connector C1 pins D, E, and F.

Ford B0378 Fault Code Meaning :

Ford B0378 Symptoms :

Ford B0378 Reasons :

How To Fix Ford B0378 Trouble Code ?

Which Ford cars have the code B0378?

  • B0378 Ford Aerostar
  • B0378 Ford Bronco
  • B0378 Ford C-Max
  • B0378 Ford C-Max Energi
  • B0378 Ford C-Max Hybrid
  • B0378 Ford Contour
  • B0378 Ford Crown Victoria
  • B0378 Ford EcoSport
  • B0378 Ford Econoline
  • B0378 Ford Edge
  • B0378 Ford Escape
  • B0378 Ford Escape Hybrid
  • B0378 Ford Escort
  • B0378 Ford Everest
  • B0378 Ford Excursion
  • B0378 Ford Expedition
  • B0378 Ford Explorer
  • B0378 Ford Explorer Sport Trac
  • B0378 Ford F-150
  • B0378 Ford F-250
  • B0378 Ford F-350
  • B0378 Ford Fiesta
  • B0378 Ford Flex
  • B0378 Ford Focus
  • B0378 Ford Focus Electric
  • B0378 Ford Freestar
  • B0378 Ford Freestyle
  • B0378 Ford Fusion
  • B0378 Ford Fusion Energi
  • B0378 Ford Fusion Hybrid
  • B0378 Ford Fusion Plug-In Hybrid
  • B0378 Ford GT
  • B0378 Ford Mustang
  • B0378 Ford Mustang Mach-E
  • B0378 Ford Mystique
  • B0378 Ford Probe
  • B0378 Ford Ranger
  • B0378 Ford Taurus
  • B0378 Ford Taurus X
  • B0378 Ford Tempo
  • B0378 Ford Thunderbird
  • B0378 Ford Transit
  • B0378 Ford Transit Connect
  • B0378 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.