P1866

P1866 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P1866 Diagnosis

The PTO 1 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for PTO 2 air solenoid fault, and for air pressure switch short 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 P1866 Fault Code Meaning :

Ford P1866 Symptoms :

Ford P1866 Reasons :

How To Fix Ford P1866 Trouble Code ?

Which Ford cars have the code P1866?

  • P1866 Ford Aerostar
  • P1866 Ford Bronco
  • P1866 Ford C-Max
  • P1866 Ford C-Max Energi
  • P1866 Ford C-Max Hybrid
  • P1866 Ford Contour
  • P1866 Ford Crown Victoria
  • P1866 Ford EcoSport
  • P1866 Ford Econoline
  • P1866 Ford Edge
  • P1866 Ford Escape
  • P1866 Ford Escape Hybrid
  • P1866 Ford Escort
  • P1866 Ford Everest
  • P1866 Ford Excursion
  • P1866 Ford Expedition
  • P1866 Ford Explorer
  • P1866 Ford Explorer Sport Trac
  • P1866 Ford F-150
  • P1866 Ford F-250
  • P1866 Ford F-350
  • P1866 Ford Fiesta
  • P1866 Ford Flex
  • P1866 Ford Focus
  • P1866 Ford Focus Electric
  • P1866 Ford Freestar
  • P1866 Ford Freestyle
  • P1866 Ford Fusion
  • P1866 Ford Fusion Energi
  • P1866 Ford Fusion Hybrid
  • P1866 Ford Fusion Plug-In Hybrid
  • P1866 Ford GT
  • P1866 Ford Mustang
  • P1866 Ford Mustang Mach-E
  • P1866 Ford Mystique
  • P1866 Ford Probe
  • P1866 Ford Ranger
  • P1866 Ford Taurus
  • P1866 Ford Taurus X
  • P1866 Ford Tempo
  • P1866 Ford Thunderbird
  • P1866 Ford Transit
  • P1866 Ford Transit Connect
  • P1866 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.