B3990
B3990 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.B3990 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 B3990 Fault Code Meaning :
Ford B3990 Symptoms :
Ford B3990 Reasons :
How To Fix Ford B3990 Trouble Code ?
Which Ford cars have the code B3990?
- B3990 Ford Aerostar
- B3990 Ford Bronco
- B3990 Ford C-Max
- B3990 Ford C-Max Energi
- B3990 Ford C-Max Hybrid
- B3990 Ford Contour
- B3990 Ford Crown Victoria
- B3990 Ford EcoSport
- B3990 Ford Econoline
- B3990 Ford Edge
- B3990 Ford Escape
- B3990 Ford Escape Hybrid
- B3990 Ford Escort
- B3990 Ford Everest
- B3990 Ford Excursion
- B3990 Ford Expedition
- B3990 Ford Explorer
- B3990 Ford Explorer Sport Trac
- B3990 Ford F-150
- B3990 Ford F-250
- B3990 Ford F-350
- B3990 Ford Fiesta
- B3990 Ford Flex
- B3990 Ford Focus
- B3990 Ford Focus Electric
- B3990 Ford Freestar
- B3990 Ford Freestyle
- B3990 Ford Fusion
- B3990 Ford Fusion Energi
- B3990 Ford Fusion Hybrid
- B3990 Ford Fusion Plug-In Hybrid
- B3990 Ford GT
- B3990 Ford Mustang
- B3990 Ford Mustang Mach-E
- B3990 Ford Mystique
- B3990 Ford Probe
- B3990 Ford Ranger
- B3990 Ford Taurus
- B3990 Ford Taurus X
- B3990 Ford Tempo
- B3990 Ford Thunderbird
- B3990 Ford Transit
- B3990 Ford Transit Connect
- B3990 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.