P3974
P3974 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.P3974 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.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 P3974 Fault Code Meaning :
Ford P3974 Symptoms :
Ford P3974 Reasons :
How To Fix Ford P3974 Trouble Code ?
Which Ford cars have the code P3974?
- P3974 Ford Aerostar
- P3974 Ford Bronco
- P3974 Ford C-Max
- P3974 Ford C-Max Energi
- P3974 Ford C-Max Hybrid
- P3974 Ford Contour
- P3974 Ford Crown Victoria
- P3974 Ford EcoSport
- P3974 Ford Econoline
- P3974 Ford Edge
- P3974 Ford Escape
- P3974 Ford Escape Hybrid
- P3974 Ford Escort
- P3974 Ford Everest
- P3974 Ford Excursion
- P3974 Ford Expedition
- P3974 Ford Explorer
- P3974 Ford Explorer Sport Trac
- P3974 Ford F-150
- P3974 Ford F-250
- P3974 Ford F-350
- P3974 Ford Fiesta
- P3974 Ford Flex
- P3974 Ford Focus
- P3974 Ford Focus Electric
- P3974 Ford Freestar
- P3974 Ford Freestyle
- P3974 Ford Fusion
- P3974 Ford Fusion Energi
- P3974 Ford Fusion Hybrid
- P3974 Ford Fusion Plug-In Hybrid
- P3974 Ford GT
- P3974 Ford Mustang
- P3974 Ford Mustang Mach-E
- P3974 Ford Mystique
- P3974 Ford Probe
- P3974 Ford Ranger
- P3974 Ford Taurus
- P3974 Ford Taurus X
- P3974 Ford Tempo
- P3974 Ford Thunderbird
- P3974 Ford Transit
- P3974 Ford Transit Connect
- P3974 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.