B3971
B3971 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.B3971 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.
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 B3971 Fault Code Meaning :
Ford B3971 Symptoms :
Ford B3971 Reasons :
How To Fix Ford B3971 Trouble Code ?
Which Ford cars have the code B3971?
- B3971 Ford Aerostar
- B3971 Ford Bronco
- B3971 Ford C-Max
- B3971 Ford C-Max Energi
- B3971 Ford C-Max Hybrid
- B3971 Ford Contour
- B3971 Ford Crown Victoria
- B3971 Ford EcoSport
- B3971 Ford Econoline
- B3971 Ford Edge
- B3971 Ford Escape
- B3971 Ford Escape Hybrid
- B3971 Ford Escort
- B3971 Ford Everest
- B3971 Ford Excursion
- B3971 Ford Expedition
- B3971 Ford Explorer
- B3971 Ford Explorer Sport Trac
- B3971 Ford F-150
- B3971 Ford F-250
- B3971 Ford F-350
- B3971 Ford Fiesta
- B3971 Ford Flex
- B3971 Ford Focus
- B3971 Ford Focus Electric
- B3971 Ford Freestar
- B3971 Ford Freestyle
- B3971 Ford Fusion
- B3971 Ford Fusion Energi
- B3971 Ford Fusion Hybrid
- B3971 Ford Fusion Plug-In Hybrid
- B3971 Ford GT
- B3971 Ford Mustang
- B3971 Ford Mustang Mach-E
- B3971 Ford Mystique
- B3971 Ford Probe
- B3971 Ford Ranger
- B3971 Ford Taurus
- B3971 Ford Taurus X
- B3971 Ford Tempo
- B3971 Ford Thunderbird
- B3971 Ford Transit
- B3971 Ford Transit Connect
- B3971 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.