U3866

U3866 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3866 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 BHM is detecting more than one smart switch with the same ID number present on the vehicle. The outputs controlled by the switch and the indicator in the switch are commanded FF.

The BHM drives the 5 cab overhead clearance and ID lamps from connector B5 pin C on circuit 46. All other marker and tail lamps are driven from BHM connector B1,K on circuit 23. This circuit connects to the CHM as an input at connector J3,P.

Ford U3866 Fault Code Meaning :

Ford U3866 Symptoms :

Ford U3866 Reasons :

How To Fix Ford U3866 Trouble Code ?

Which Ford cars have the code U3866?

  • U3866 Ford Aerostar
  • U3866 Ford Bronco
  • U3866 Ford C-Max
  • U3866 Ford C-Max Energi
  • U3866 Ford C-Max Hybrid
  • U3866 Ford Contour
  • U3866 Ford Crown Victoria
  • U3866 Ford EcoSport
  • U3866 Ford Econoline
  • U3866 Ford Edge
  • U3866 Ford Escape
  • U3866 Ford Escape Hybrid
  • U3866 Ford Escort
  • U3866 Ford Everest
  • U3866 Ford Excursion
  • U3866 Ford Expedition
  • U3866 Ford Explorer
  • U3866 Ford Explorer Sport Trac
  • U3866 Ford F-150
  • U3866 Ford F-250
  • U3866 Ford F-350
  • U3866 Ford Fiesta
  • U3866 Ford Flex
  • U3866 Ford Focus
  • U3866 Ford Focus Electric
  • U3866 Ford Freestar
  • U3866 Ford Freestyle
  • U3866 Ford Fusion
  • U3866 Ford Fusion Energi
  • U3866 Ford Fusion Hybrid
  • U3866 Ford Fusion Plug-In Hybrid
  • U3866 Ford GT
  • U3866 Ford Mustang
  • U3866 Ford Mustang Mach-E
  • U3866 Ford Mystique
  • U3866 Ford Probe
  • U3866 Ford Ranger
  • U3866 Ford Taurus
  • U3866 Ford Taurus X
  • U3866 Ford Tempo
  • U3866 Ford Thunderbird
  • U3866 Ford Transit
  • U3866 Ford Transit Connect
  • U3866 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.