U0646

U0646 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U0646 Diagnosis

This fault indicates that the circuit is drawing more current than it is designed to supply, and possibly there is a wiring fault shorting this circuit to ground. The fault remains active until the ignition is turned ON when the fault is no longer present.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 U0646 Fault Code Meaning :

Ford U0646 Symptoms :

Ford U0646 Reasons :

How To Fix Ford U0646 Trouble Code ?

Which Ford cars have the code U0646?

  • U0646 Ford Aerostar
  • U0646 Ford Bronco
  • U0646 Ford C-Max
  • U0646 Ford C-Max Energi
  • U0646 Ford C-Max Hybrid
  • U0646 Ford Contour
  • U0646 Ford Crown Victoria
  • U0646 Ford EcoSport
  • U0646 Ford Econoline
  • U0646 Ford Edge
  • U0646 Ford Escape
  • U0646 Ford Escape Hybrid
  • U0646 Ford Escort
  • U0646 Ford Everest
  • U0646 Ford Excursion
  • U0646 Ford Expedition
  • U0646 Ford Explorer
  • U0646 Ford Explorer Sport Trac
  • U0646 Ford F-150
  • U0646 Ford F-250
  • U0646 Ford F-350
  • U0646 Ford Fiesta
  • U0646 Ford Flex
  • U0646 Ford Focus
  • U0646 Ford Focus Electric
  • U0646 Ford Freestar
  • U0646 Ford Freestyle
  • U0646 Ford Fusion
  • U0646 Ford Fusion Energi
  • U0646 Ford Fusion Hybrid
  • U0646 Ford Fusion Plug-In Hybrid
  • U0646 Ford GT
  • U0646 Ford Mustang
  • U0646 Ford Mustang Mach-E
  • U0646 Ford Mystique
  • U0646 Ford Probe
  • U0646 Ford Ranger
  • U0646 Ford Taurus
  • U0646 Ford Taurus X
  • U0646 Ford Tempo
  • U0646 Ford Thunderbird
  • U0646 Ford Transit
  • U0646 Ford Transit Connect
  • U0646 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.