P21C4

P21C4 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P21C4 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 P21C4 Fault Code Meaning :

Ford P21C4 Symptoms :

Ford P21C4 Reasons :

How To Fix Ford P21C4 Trouble Code ?

Which Ford cars have the code P21C4?

  • P21C4 Ford Aerostar
  • P21C4 Ford Bronco
  • P21C4 Ford C-Max
  • P21C4 Ford C-Max Energi
  • P21C4 Ford C-Max Hybrid
  • P21C4 Ford Contour
  • P21C4 Ford Crown Victoria
  • P21C4 Ford EcoSport
  • P21C4 Ford Econoline
  • P21C4 Ford Edge
  • P21C4 Ford Escape
  • P21C4 Ford Escape Hybrid
  • P21C4 Ford Escort
  • P21C4 Ford Everest
  • P21C4 Ford Excursion
  • P21C4 Ford Expedition
  • P21C4 Ford Explorer
  • P21C4 Ford Explorer Sport Trac
  • P21C4 Ford F-150
  • P21C4 Ford F-250
  • P21C4 Ford F-350
  • P21C4 Ford Fiesta
  • P21C4 Ford Flex
  • P21C4 Ford Focus
  • P21C4 Ford Focus Electric
  • P21C4 Ford Freestar
  • P21C4 Ford Freestyle
  • P21C4 Ford Fusion
  • P21C4 Ford Fusion Energi
  • P21C4 Ford Fusion Hybrid
  • P21C4 Ford Fusion Plug-In Hybrid
  • P21C4 Ford GT
  • P21C4 Ford Mustang
  • P21C4 Ford Mustang Mach-E
  • P21C4 Ford Mystique
  • P21C4 Ford Probe
  • P21C4 Ford Ranger
  • P21C4 Ford Taurus
  • P21C4 Ford Taurus X
  • P21C4 Ford Tempo
  • P21C4 Ford Thunderbird
  • P21C4 Ford Transit
  • P21C4 Ford Transit Connect
  • P21C4 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.