P0F21

P0F21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P0F21 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 P0F21 Fault Code Meaning :

Ford P0F21 Symptoms :

Ford P0F21 Reasons :

How To Fix Ford P0F21 Trouble Code ?

Which Ford cars have the code P0F21?

  • P0F21 Ford Aerostar
  • P0F21 Ford Bronco
  • P0F21 Ford C-Max
  • P0F21 Ford C-Max Energi
  • P0F21 Ford C-Max Hybrid
  • P0F21 Ford Contour
  • P0F21 Ford Crown Victoria
  • P0F21 Ford EcoSport
  • P0F21 Ford Econoline
  • P0F21 Ford Edge
  • P0F21 Ford Escape
  • P0F21 Ford Escape Hybrid
  • P0F21 Ford Escort
  • P0F21 Ford Everest
  • P0F21 Ford Excursion
  • P0F21 Ford Expedition
  • P0F21 Ford Explorer
  • P0F21 Ford Explorer Sport Trac
  • P0F21 Ford F-150
  • P0F21 Ford F-250
  • P0F21 Ford F-350
  • P0F21 Ford Fiesta
  • P0F21 Ford Flex
  • P0F21 Ford Focus
  • P0F21 Ford Focus Electric
  • P0F21 Ford Freestar
  • P0F21 Ford Freestyle
  • P0F21 Ford Fusion
  • P0F21 Ford Fusion Energi
  • P0F21 Ford Fusion Hybrid
  • P0F21 Ford Fusion Plug-In Hybrid
  • P0F21 Ford GT
  • P0F21 Ford Mustang
  • P0F21 Ford Mustang Mach-E
  • P0F21 Ford Mystique
  • P0F21 Ford Probe
  • P0F21 Ford Ranger
  • P0F21 Ford Taurus
  • P0F21 Ford Taurus X
  • P0F21 Ford Tempo
  • P0F21 Ford Thunderbird
  • P0F21 Ford Transit
  • P0F21 Ford Transit Connect
  • P0F21 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.