U3821

U3821 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3821 Diagnosis

The CHM does not suupport PWM type DRLs. The vehicle has a BHM mismatch with the CHM. Replace the CHM with one that is compatible with the BHM.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.

A comparison of pressures from all sensors is made. The smallest difference between the three is determined and a reference pressure is calculated. The Barometric pressure sensor value is compared to the reference value and if the difference is above the threshold a DTC is reported.

Ford U3821 Fault Code Meaning :

Ford U3821 Symptoms :

Ford U3821 Reasons :

How To Fix Ford U3821 Trouble Code ?

Which Ford cars have the code U3821?

  • U3821 Ford Aerostar
  • U3821 Ford Bronco
  • U3821 Ford C-Max
  • U3821 Ford C-Max Energi
  • U3821 Ford C-Max Hybrid
  • U3821 Ford Contour
  • U3821 Ford Crown Victoria
  • U3821 Ford EcoSport
  • U3821 Ford Econoline
  • U3821 Ford Edge
  • U3821 Ford Escape
  • U3821 Ford Escape Hybrid
  • U3821 Ford Escort
  • U3821 Ford Everest
  • U3821 Ford Excursion
  • U3821 Ford Expedition
  • U3821 Ford Explorer
  • U3821 Ford Explorer Sport Trac
  • U3821 Ford F-150
  • U3821 Ford F-250
  • U3821 Ford F-350
  • U3821 Ford Fiesta
  • U3821 Ford Flex
  • U3821 Ford Focus
  • U3821 Ford Focus Electric
  • U3821 Ford Freestar
  • U3821 Ford Freestyle
  • U3821 Ford Fusion
  • U3821 Ford Fusion Energi
  • U3821 Ford Fusion Hybrid
  • U3821 Ford Fusion Plug-In Hybrid
  • U3821 Ford GT
  • U3821 Ford Mustang
  • U3821 Ford Mustang Mach-E
  • U3821 Ford Mystique
  • U3821 Ford Probe
  • U3821 Ford Ranger
  • U3821 Ford Taurus
  • U3821 Ford Taurus X
  • U3821 Ford Tempo
  • U3821 Ford Thunderbird
  • U3821 Ford Transit
  • U3821 Ford Transit Connect
  • U3821 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.