P3857

P3857 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3857 Diagnosis

The fault remains active until the ignition is turned ON when the fault is no longer present. Some BHM configurations force this circuit off until the ignition switch is cycled.Determine if the extra switch is not required for the vehicle or if the switch has been installed but the necessary reference parameter has not been programmed into the BHM.

This circuit connects to the CHM as an input at connector J3,P. The CHM passes the signal through to power the tail lamps and marker lamps from connector C2 pin G and also from connector C1 pins D, E, and F.

Ford P3857 Fault Code Meaning :

Ford P3857 Symptoms :

Ford P3857 Reasons :

How To Fix Ford P3857 Trouble Code ?

Which Ford cars have the code P3857?

  • P3857 Ford Aerostar
  • P3857 Ford Bronco
  • P3857 Ford C-Max
  • P3857 Ford C-Max Energi
  • P3857 Ford C-Max Hybrid
  • P3857 Ford Contour
  • P3857 Ford Crown Victoria
  • P3857 Ford EcoSport
  • P3857 Ford Econoline
  • P3857 Ford Edge
  • P3857 Ford Escape
  • P3857 Ford Escape Hybrid
  • P3857 Ford Escort
  • P3857 Ford Everest
  • P3857 Ford Excursion
  • P3857 Ford Expedition
  • P3857 Ford Explorer
  • P3857 Ford Explorer Sport Trac
  • P3857 Ford F-150
  • P3857 Ford F-250
  • P3857 Ford F-350
  • P3857 Ford Fiesta
  • P3857 Ford Flex
  • P3857 Ford Focus
  • P3857 Ford Focus Electric
  • P3857 Ford Freestar
  • P3857 Ford Freestyle
  • P3857 Ford Fusion
  • P3857 Ford Fusion Energi
  • P3857 Ford Fusion Hybrid
  • P3857 Ford Fusion Plug-In Hybrid
  • P3857 Ford GT
  • P3857 Ford Mustang
  • P3857 Ford Mustang Mach-E
  • P3857 Ford Mystique
  • P3857 Ford Probe
  • P3857 Ford Ranger
  • P3857 Ford Taurus
  • P3857 Ford Taurus X
  • P3857 Ford Tempo
  • P3857 Ford Thunderbird
  • P3857 Ford Transit
  • P3857 Ford Transit Connect
  • P3857 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.