P1D21

P1D21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P1D21 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 P1D21 Fault Code Meaning :

Ford P1D21 Symptoms :

Ford P1D21 Reasons :

How To Fix Ford P1D21 Trouble Code ?

Which Ford cars have the code P1D21?

  • P1D21 Ford Aerostar
  • P1D21 Ford Bronco
  • P1D21 Ford C-Max
  • P1D21 Ford C-Max Energi
  • P1D21 Ford C-Max Hybrid
  • P1D21 Ford Contour
  • P1D21 Ford Crown Victoria
  • P1D21 Ford EcoSport
  • P1D21 Ford Econoline
  • P1D21 Ford Edge
  • P1D21 Ford Escape
  • P1D21 Ford Escape Hybrid
  • P1D21 Ford Escort
  • P1D21 Ford Everest
  • P1D21 Ford Excursion
  • P1D21 Ford Expedition
  • P1D21 Ford Explorer
  • P1D21 Ford Explorer Sport Trac
  • P1D21 Ford F-150
  • P1D21 Ford F-250
  • P1D21 Ford F-350
  • P1D21 Ford Fiesta
  • P1D21 Ford Flex
  • P1D21 Ford Focus
  • P1D21 Ford Focus Electric
  • P1D21 Ford Freestar
  • P1D21 Ford Freestyle
  • P1D21 Ford Fusion
  • P1D21 Ford Fusion Energi
  • P1D21 Ford Fusion Hybrid
  • P1D21 Ford Fusion Plug-In Hybrid
  • P1D21 Ford GT
  • P1D21 Ford Mustang
  • P1D21 Ford Mustang Mach-E
  • P1D21 Ford Mystique
  • P1D21 Ford Probe
  • P1D21 Ford Ranger
  • P1D21 Ford Taurus
  • P1D21 Ford Taurus X
  • P1D21 Ford Tempo
  • P1D21 Ford Thunderbird
  • P1D21 Ford Transit
  • P1D21 Ford Transit Connect
  • P1D21 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.