P9C21

P9C21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P9C21 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 P9C21 Fault Code Meaning :

Ford P9C21 Symptoms :

Ford P9C21 Reasons :

How To Fix Ford P9C21 Trouble Code ?

Which Ford cars have the code P9C21?

  • P9C21 Ford Aerostar
  • P9C21 Ford Bronco
  • P9C21 Ford C-Max
  • P9C21 Ford C-Max Energi
  • P9C21 Ford C-Max Hybrid
  • P9C21 Ford Contour
  • P9C21 Ford Crown Victoria
  • P9C21 Ford EcoSport
  • P9C21 Ford Econoline
  • P9C21 Ford Edge
  • P9C21 Ford Escape
  • P9C21 Ford Escape Hybrid
  • P9C21 Ford Escort
  • P9C21 Ford Everest
  • P9C21 Ford Excursion
  • P9C21 Ford Expedition
  • P9C21 Ford Explorer
  • P9C21 Ford Explorer Sport Trac
  • P9C21 Ford F-150
  • P9C21 Ford F-250
  • P9C21 Ford F-350
  • P9C21 Ford Fiesta
  • P9C21 Ford Flex
  • P9C21 Ford Focus
  • P9C21 Ford Focus Electric
  • P9C21 Ford Freestar
  • P9C21 Ford Freestyle
  • P9C21 Ford Fusion
  • P9C21 Ford Fusion Energi
  • P9C21 Ford Fusion Hybrid
  • P9C21 Ford Fusion Plug-In Hybrid
  • P9C21 Ford GT
  • P9C21 Ford Mustang
  • P9C21 Ford Mustang Mach-E
  • P9C21 Ford Mystique
  • P9C21 Ford Probe
  • P9C21 Ford Ranger
  • P9C21 Ford Taurus
  • P9C21 Ford Taurus X
  • P9C21 Ford Tempo
  • P9C21 Ford Thunderbird
  • P9C21 Ford Transit
  • P9C21 Ford Transit Connect
  • P9C21 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.