P3A21

P3A21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3A21 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 supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for a wiring fault shorting this circuit to ground or for too many optional circuits spliced into it that is causing the BHM to turn it off.

The suspension proportioning output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for suspension proportioning air solenoid fault, and for air pressure switch short circuit fault.

Ford P3A21 Fault Code Meaning :

Ford P3A21 Symptoms :

Ford P3A21 Reasons :

How To Fix Ford P3A21 Trouble Code ?

Which Ford cars have the code P3A21?

  • P3A21 Ford Aerostar
  • P3A21 Ford Bronco
  • P3A21 Ford C-Max
  • P3A21 Ford C-Max Energi
  • P3A21 Ford C-Max Hybrid
  • P3A21 Ford Contour
  • P3A21 Ford Crown Victoria
  • P3A21 Ford EcoSport
  • P3A21 Ford Econoline
  • P3A21 Ford Edge
  • P3A21 Ford Escape
  • P3A21 Ford Escape Hybrid
  • P3A21 Ford Escort
  • P3A21 Ford Everest
  • P3A21 Ford Excursion
  • P3A21 Ford Expedition
  • P3A21 Ford Explorer
  • P3A21 Ford Explorer Sport Trac
  • P3A21 Ford F-150
  • P3A21 Ford F-250
  • P3A21 Ford F-350
  • P3A21 Ford Fiesta
  • P3A21 Ford Flex
  • P3A21 Ford Focus
  • P3A21 Ford Focus Electric
  • P3A21 Ford Freestar
  • P3A21 Ford Freestyle
  • P3A21 Ford Fusion
  • P3A21 Ford Fusion Energi
  • P3A21 Ford Fusion Hybrid
  • P3A21 Ford Fusion Plug-In Hybrid
  • P3A21 Ford GT
  • P3A21 Ford Mustang
  • P3A21 Ford Mustang Mach-E
  • P3A21 Ford Mystique
  • P3A21 Ford Probe
  • P3A21 Ford Ranger
  • P3A21 Ford Taurus
  • P3A21 Ford Taurus X
  • P3A21 Ford Tempo
  • P3A21 Ford Thunderbird
  • P3A21 Ford Transit
  • P3A21 Ford Transit Connect
  • P3A21 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.