C3521
C3521 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.C3521 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 position information for the switch becomes Not Available. Remove the duplicate Smart Switch, then use ServiceLink to verify that the correct Smart Switches are configured for the vehicle.
Engine starting is disabled and other optional functions may be interrupted until the fault is corrected and the ignition switch is cycled.
Ford C3521 Fault Code Meaning :
Ford C3521 Symptoms :
Ford C3521 Reasons :
How To Fix Ford C3521 Trouble Code ?
Which Ford cars have the code C3521?
- C3521 Ford Aerostar
- C3521 Ford Bronco
- C3521 Ford C-Max
- C3521 Ford C-Max Energi
- C3521 Ford C-Max Hybrid
- C3521 Ford Contour
- C3521 Ford Crown Victoria
- C3521 Ford EcoSport
- C3521 Ford Econoline
- C3521 Ford Edge
- C3521 Ford Escape
- C3521 Ford Escape Hybrid
- C3521 Ford Escort
- C3521 Ford Everest
- C3521 Ford Excursion
- C3521 Ford Expedition
- C3521 Ford Explorer
- C3521 Ford Explorer Sport Trac
- C3521 Ford F-150
- C3521 Ford F-250
- C3521 Ford F-350
- C3521 Ford Fiesta
- C3521 Ford Flex
- C3521 Ford Focus
- C3521 Ford Focus Electric
- C3521 Ford Freestar
- C3521 Ford Freestyle
- C3521 Ford Fusion
- C3521 Ford Fusion Energi
- C3521 Ford Fusion Hybrid
- C3521 Ford Fusion Plug-In Hybrid
- C3521 Ford GT
- C3521 Ford Mustang
- C3521 Ford Mustang Mach-E
- C3521 Ford Mystique
- C3521 Ford Probe
- C3521 Ford Ranger
- C3521 Ford Taurus
- C3521 Ford Taurus X
- C3521 Ford Tempo
- C3521 Ford Thunderbird
- C3521 Ford Transit
- C3521 Ford Transit Connect
- C3521 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.