U3949
U3949 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.U3949 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.The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for a wiring fault shorting this circuit to ground or for too many optional circuits spliced into it that is causing the BHM to turn it off.
When the engine is in higher engine speed and torque condition, the differential pressure over the DPF is expected to rise according to engine speed and torque. If the differential pressure exceeds a threshold then the differential pressure sensor plausibility DTC is set.
Ford U3949 Fault Code Meaning :
Ford U3949 Symptoms :
Ford U3949 Reasons :
How To Fix Ford U3949 Trouble Code ?
Which Ford cars have the code U3949?
- U3949 Ford Aerostar
- U3949 Ford Bronco
- U3949 Ford C-Max
- U3949 Ford C-Max Energi
- U3949 Ford C-Max Hybrid
- U3949 Ford Contour
- U3949 Ford Crown Victoria
- U3949 Ford EcoSport
- U3949 Ford Econoline
- U3949 Ford Edge
- U3949 Ford Escape
- U3949 Ford Escape Hybrid
- U3949 Ford Escort
- U3949 Ford Everest
- U3949 Ford Excursion
- U3949 Ford Expedition
- U3949 Ford Explorer
- U3949 Ford Explorer Sport Trac
- U3949 Ford F-150
- U3949 Ford F-250
- U3949 Ford F-350
- U3949 Ford Fiesta
- U3949 Ford Flex
- U3949 Ford Focus
- U3949 Ford Focus Electric
- U3949 Ford Freestar
- U3949 Ford Freestyle
- U3949 Ford Fusion
- U3949 Ford Fusion Energi
- U3949 Ford Fusion Hybrid
- U3949 Ford Fusion Plug-In Hybrid
- U3949 Ford GT
- U3949 Ford Mustang
- U3949 Ford Mustang Mach-E
- U3949 Ford Mystique
- U3949 Ford Probe
- U3949 Ford Ranger
- U3949 Ford Taurus
- U3949 Ford Taurus X
- U3949 Ford Tempo
- U3949 Ford Thunderbird
- U3949 Ford Transit
- U3949 Ford Transit Connect
- U3949 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.