P0666

P0666 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P0666 Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open circuit fault.The ICU reads the wiper switch position and sends the status of the switch to the BHM. This fault becomes active when the ICU reads that both LO speed and HI speed are active at the same time.

The BHM measures the current on this circuit when the headlamp output is commanded ON. This fault indicates that the left high beam headlamp circuit is drawing more current than it is designed to supply and possibly there is a wiring fault shorting this circuit to ground.

Ford P0666 Fault Code Meaning :

Ford P0666 Symptoms :

Ford P0666 Reasons :

How To Fix Ford P0666 Trouble Code ?

Which Ford cars have the code P0666?

  • P0666 Ford Aerostar
  • P0666 Ford Bronco
  • P0666 Ford C-Max
  • P0666 Ford C-Max Energi
  • P0666 Ford C-Max Hybrid
  • P0666 Ford Contour
  • P0666 Ford Crown Victoria
  • P0666 Ford EcoSport
  • P0666 Ford Econoline
  • P0666 Ford Edge
  • P0666 Ford Escape
  • P0666 Ford Escape Hybrid
  • P0666 Ford Escort
  • P0666 Ford Everest
  • P0666 Ford Excursion
  • P0666 Ford Expedition
  • P0666 Ford Explorer
  • P0666 Ford Explorer Sport Trac
  • P0666 Ford F-150
  • P0666 Ford F-250
  • P0666 Ford F-350
  • P0666 Ford Fiesta
  • P0666 Ford Flex
  • P0666 Ford Focus
  • P0666 Ford Focus Electric
  • P0666 Ford Freestar
  • P0666 Ford Freestyle
  • P0666 Ford Fusion
  • P0666 Ford Fusion Energi
  • P0666 Ford Fusion Hybrid
  • P0666 Ford Fusion Plug-In Hybrid
  • P0666 Ford GT
  • P0666 Ford Mustang
  • P0666 Ford Mustang Mach-E
  • P0666 Ford Mystique
  • P0666 Ford Probe
  • P0666 Ford Ranger
  • P0666 Ford Taurus
  • P0666 Ford Taurus X
  • P0666 Ford Tempo
  • P0666 Ford Thunderbird
  • P0666 Ford Transit
  • P0666 Ford Transit Connect
  • P0666 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.