P521D

P521D Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P521D Diagnosis

The PTO 1 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for PTO 2 air solenoid fault, and for air pressure switch short circuit fault.The ICU reads the wiper switch position and sends the status of the switch to the BHM. This fault becomes active when the ICU reads that both LO speed and HI speed are active at the same time.

The BHM measures the current on this circuit when the headlamp output is commanded ON. This fault indicates that the left high beam headlamp circuit is drawing more current than it is designed to supply and possibly there is a wiring fault shorting this circuit to ground.

Ford P521D Fault Code Meaning :

Ford P521D Symptoms :

Ford P521D Reasons :

How To Fix Ford P521D Trouble Code ?

Which Ford cars have the code P521D?

  • P521D Ford Aerostar
  • P521D Ford Bronco
  • P521D Ford C-Max
  • P521D Ford C-Max Energi
  • P521D Ford C-Max Hybrid
  • P521D Ford Contour
  • P521D Ford Crown Victoria
  • P521D Ford EcoSport
  • P521D Ford Econoline
  • P521D Ford Edge
  • P521D Ford Escape
  • P521D Ford Escape Hybrid
  • P521D Ford Escort
  • P521D Ford Everest
  • P521D Ford Excursion
  • P521D Ford Expedition
  • P521D Ford Explorer
  • P521D Ford Explorer Sport Trac
  • P521D Ford F-150
  • P521D Ford F-250
  • P521D Ford F-350
  • P521D Ford Fiesta
  • P521D Ford Flex
  • P521D Ford Focus
  • P521D Ford Focus Electric
  • P521D Ford Freestar
  • P521D Ford Freestyle
  • P521D Ford Fusion
  • P521D Ford Fusion Energi
  • P521D Ford Fusion Hybrid
  • P521D Ford Fusion Plug-In Hybrid
  • P521D Ford GT
  • P521D Ford Mustang
  • P521D Ford Mustang Mach-E
  • P521D Ford Mystique
  • P521D Ford Probe
  • P521D Ford Ranger
  • P521D Ford Taurus
  • P521D Ford Taurus X
  • P521D Ford Tempo
  • P521D Ford Thunderbird
  • P521D Ford Transit
  • P521D Ford Transit Connect
  • P521D 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.