U121B
U121B Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.U121B Diagnosis
The output circuits that are powered by VBAT3 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. The fuse in the main PDM powering this circuit may be open.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 U121B Fault Code Meaning :
Ford U121B Symptoms :
Ford U121B Reasons :
How To Fix Ford U121B Trouble Code ?
Which Ford cars have the code U121B?
- U121B Ford Aerostar
- U121B Ford Bronco
- U121B Ford C-Max
- U121B Ford C-Max Energi
- U121B Ford C-Max Hybrid
- U121B Ford Contour
- U121B Ford Crown Victoria
- U121B Ford EcoSport
- U121B Ford Econoline
- U121B Ford Edge
- U121B Ford Escape
- U121B Ford Escape Hybrid
- U121B Ford Escort
- U121B Ford Everest
- U121B Ford Excursion
- U121B Ford Expedition
- U121B Ford Explorer
- U121B Ford Explorer Sport Trac
- U121B Ford F-150
- U121B Ford F-250
- U121B Ford F-350
- U121B Ford Fiesta
- U121B Ford Flex
- U121B Ford Focus
- U121B Ford Focus Electric
- U121B Ford Freestar
- U121B Ford Freestyle
- U121B Ford Fusion
- U121B Ford Fusion Energi
- U121B Ford Fusion Hybrid
- U121B Ford Fusion Plug-In Hybrid
- U121B Ford GT
- U121B Ford Mustang
- U121B Ford Mustang Mach-E
- U121B Ford Mystique
- U121B Ford Probe
- U121B Ford Ranger
- U121B Ford Taurus
- U121B Ford Taurus X
- U121B Ford Tempo
- U121B Ford Thunderbird
- U121B Ford Transit
- U121B Ford Transit Connect
- U121B 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.