P3521

P3521 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3521 Diagnosis

The fuse in the main PDM powering this circuit may be open. The root cause could be excessive loads on an output, or a short to ground in the VBAT2 supply to the CHM.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.

When the engine is in higher engine speed and torque condition, the differential pressure over the DPF is expected to rise according to engine speed and torque. If the differential pressure exceeds a threshold then the differential pressure sensor plausibility DTC is set.

Ford P3521 Fault Code Meaning :

Ford P3521 Symptoms :

Ford P3521 Reasons :

How To Fix Ford P3521 Trouble Code ?

Which Ford cars have the code P3521?

  • P3521 Ford Aerostar
  • P3521 Ford Bronco
  • P3521 Ford C-Max
  • P3521 Ford C-Max Energi
  • P3521 Ford C-Max Hybrid
  • P3521 Ford Contour
  • P3521 Ford Crown Victoria
  • P3521 Ford EcoSport
  • P3521 Ford Econoline
  • P3521 Ford Edge
  • P3521 Ford Escape
  • P3521 Ford Escape Hybrid
  • P3521 Ford Escort
  • P3521 Ford Everest
  • P3521 Ford Excursion
  • P3521 Ford Expedition
  • P3521 Ford Explorer
  • P3521 Ford Explorer Sport Trac
  • P3521 Ford F-150
  • P3521 Ford F-250
  • P3521 Ford F-350
  • P3521 Ford Fiesta
  • P3521 Ford Flex
  • P3521 Ford Focus
  • P3521 Ford Focus Electric
  • P3521 Ford Freestar
  • P3521 Ford Freestyle
  • P3521 Ford Fusion
  • P3521 Ford Fusion Energi
  • P3521 Ford Fusion Hybrid
  • P3521 Ford Fusion Plug-In Hybrid
  • P3521 Ford GT
  • P3521 Ford Mustang
  • P3521 Ford Mustang Mach-E
  • P3521 Ford Mystique
  • P3521 Ford Probe
  • P3521 Ford Ranger
  • P3521 Ford Taurus
  • P3521 Ford Taurus X
  • P3521 Ford Tempo
  • P3521 Ford Thunderbird
  • P3521 Ford Transit
  • P3521 Ford Transit Connect
  • P3521 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.