C21AC

C21AC Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C21AC Diagnosis

The output circuits that are powered by VBAT3 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. The fuse in the main PDM powering this circuit may be open.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 C21AC Fault Code Meaning :

Ford C21AC Symptoms :

Ford C21AC Reasons :

How To Fix Ford C21AC Trouble Code ?

Which Ford cars have the code C21AC?

  • C21AC Ford Aerostar
  • C21AC Ford Bronco
  • C21AC Ford C-Max
  • C21AC Ford C-Max Energi
  • C21AC Ford C-Max Hybrid
  • C21AC Ford Contour
  • C21AC Ford Crown Victoria
  • C21AC Ford EcoSport
  • C21AC Ford Econoline
  • C21AC Ford Edge
  • C21AC Ford Escape
  • C21AC Ford Escape Hybrid
  • C21AC Ford Escort
  • C21AC Ford Everest
  • C21AC Ford Excursion
  • C21AC Ford Expedition
  • C21AC Ford Explorer
  • C21AC Ford Explorer Sport Trac
  • C21AC Ford F-150
  • C21AC Ford F-250
  • C21AC Ford F-350
  • C21AC Ford Fiesta
  • C21AC Ford Flex
  • C21AC Ford Focus
  • C21AC Ford Focus Electric
  • C21AC Ford Freestar
  • C21AC Ford Freestyle
  • C21AC Ford Fusion
  • C21AC Ford Fusion Energi
  • C21AC Ford Fusion Hybrid
  • C21AC Ford Fusion Plug-In Hybrid
  • C21AC Ford GT
  • C21AC Ford Mustang
  • C21AC Ford Mustang Mach-E
  • C21AC Ford Mystique
  • C21AC Ford Probe
  • C21AC Ford Ranger
  • C21AC Ford Taurus
  • C21AC Ford Taurus X
  • C21AC Ford Tempo
  • C21AC Ford Thunderbird
  • C21AC Ford Transit
  • C21AC Ford Transit Connect
  • C21AC 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.