P421D

P421D Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P421D Diagnosis

The axle lift 2 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for axle lift 2 air solenoid fault, and for air pressure switch short circuit fault.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 P421D Fault Code Meaning :

Ford P421D Symptoms :

Ford P421D Reasons :

How To Fix Ford P421D Trouble Code ?

Which Ford cars have the code P421D?

  • P421D Ford Aerostar
  • P421D Ford Bronco
  • P421D Ford C-Max
  • P421D Ford C-Max Energi
  • P421D Ford C-Max Hybrid
  • P421D Ford Contour
  • P421D Ford Crown Victoria
  • P421D Ford EcoSport
  • P421D Ford Econoline
  • P421D Ford Edge
  • P421D Ford Escape
  • P421D Ford Escape Hybrid
  • P421D Ford Escort
  • P421D Ford Everest
  • P421D Ford Excursion
  • P421D Ford Expedition
  • P421D Ford Explorer
  • P421D Ford Explorer Sport Trac
  • P421D Ford F-150
  • P421D Ford F-250
  • P421D Ford F-350
  • P421D Ford Fiesta
  • P421D Ford Flex
  • P421D Ford Focus
  • P421D Ford Focus Electric
  • P421D Ford Freestar
  • P421D Ford Freestyle
  • P421D Ford Fusion
  • P421D Ford Fusion Energi
  • P421D Ford Fusion Hybrid
  • P421D Ford Fusion Plug-In Hybrid
  • P421D Ford GT
  • P421D Ford Mustang
  • P421D Ford Mustang Mach-E
  • P421D Ford Mystique
  • P421D Ford Probe
  • P421D Ford Ranger
  • P421D Ford Taurus
  • P421D Ford Taurus X
  • P421D Ford Tempo
  • P421D Ford Thunderbird
  • P421D Ford Transit
  • P421D Ford Transit Connect
  • P421D 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.