P8F21

P8F21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P8F21 Diagnosis

The CHM does not suupport PWM type DRLs. The vehicle has a BHM mismatch with the CHM. Replace the CHM with one that is compatible with the BHM.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 End of Frame air output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for an End of Frame air solenoid fault, and for an air pressure switch short circuit fault.

Ford P8F21 Fault Code Meaning :

Ford P8F21 Symptoms :

Ford P8F21 Reasons :

How To Fix Ford P8F21 Trouble Code ?

Which Ford cars have the code P8F21?

  • P8F21 Ford Aerostar
  • P8F21 Ford Bronco
  • P8F21 Ford C-Max
  • P8F21 Ford C-Max Energi
  • P8F21 Ford C-Max Hybrid
  • P8F21 Ford Contour
  • P8F21 Ford Crown Victoria
  • P8F21 Ford EcoSport
  • P8F21 Ford Econoline
  • P8F21 Ford Edge
  • P8F21 Ford Escape
  • P8F21 Ford Escape Hybrid
  • P8F21 Ford Escort
  • P8F21 Ford Everest
  • P8F21 Ford Excursion
  • P8F21 Ford Expedition
  • P8F21 Ford Explorer
  • P8F21 Ford Explorer Sport Trac
  • P8F21 Ford F-150
  • P8F21 Ford F-250
  • P8F21 Ford F-350
  • P8F21 Ford Fiesta
  • P8F21 Ford Flex
  • P8F21 Ford Focus
  • P8F21 Ford Focus Electric
  • P8F21 Ford Freestar
  • P8F21 Ford Freestyle
  • P8F21 Ford Fusion
  • P8F21 Ford Fusion Energi
  • P8F21 Ford Fusion Hybrid
  • P8F21 Ford Fusion Plug-In Hybrid
  • P8F21 Ford GT
  • P8F21 Ford Mustang
  • P8F21 Ford Mustang Mach-E
  • P8F21 Ford Mystique
  • P8F21 Ford Probe
  • P8F21 Ford Ranger
  • P8F21 Ford Taurus
  • P8F21 Ford Taurus X
  • P8F21 Ford Tempo
  • P8F21 Ford Thunderbird
  • P8F21 Ford Transit
  • P8F21 Ford Transit Connect
  • P8F21 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.