P521A

P521A Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P521A Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open 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 OFF.

The disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.

Ford P521A Fault Code Meaning :

Ford P521A Symptoms :

Ford P521A Reasons :

How To Fix Ford P521A Trouble Code ?

Which Ford cars have the code P521A?

  • P521A Ford Aerostar
  • P521A Ford Bronco
  • P521A Ford C-Max
  • P521A Ford C-Max Energi
  • P521A Ford C-Max Hybrid
  • P521A Ford Contour
  • P521A Ford Crown Victoria
  • P521A Ford EcoSport
  • P521A Ford Econoline
  • P521A Ford Edge
  • P521A Ford Escape
  • P521A Ford Escape Hybrid
  • P521A Ford Escort
  • P521A Ford Everest
  • P521A Ford Excursion
  • P521A Ford Expedition
  • P521A Ford Explorer
  • P521A Ford Explorer Sport Trac
  • P521A Ford F-150
  • P521A Ford F-250
  • P521A Ford F-350
  • P521A Ford Fiesta
  • P521A Ford Flex
  • P521A Ford Focus
  • P521A Ford Focus Electric
  • P521A Ford Freestar
  • P521A Ford Freestyle
  • P521A Ford Fusion
  • P521A Ford Fusion Energi
  • P521A Ford Fusion Hybrid
  • P521A Ford Fusion Plug-In Hybrid
  • P521A Ford GT
  • P521A Ford Mustang
  • P521A Ford Mustang Mach-E
  • P521A Ford Mystique
  • P521A Ford Probe
  • P521A Ford Ranger
  • P521A Ford Taurus
  • P521A Ford Taurus X
  • P521A Ford Tempo
  • P521A Ford Thunderbird
  • P521A Ford Transit
  • P521A Ford Transit Connect
  • P521A 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.