P9C91

P9C91 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P9C91 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.

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 P9C91 Fault Code Meaning :

Ford P9C91 Symptoms :

Ford P9C91 Reasons :

How To Fix Ford P9C91 Trouble Code ?

Which Ford cars have the code P9C91?

  • P9C91 Ford Aerostar
  • P9C91 Ford Bronco
  • P9C91 Ford C-Max
  • P9C91 Ford C-Max Energi
  • P9C91 Ford C-Max Hybrid
  • P9C91 Ford Contour
  • P9C91 Ford Crown Victoria
  • P9C91 Ford EcoSport
  • P9C91 Ford Econoline
  • P9C91 Ford Edge
  • P9C91 Ford Escape
  • P9C91 Ford Escape Hybrid
  • P9C91 Ford Escort
  • P9C91 Ford Everest
  • P9C91 Ford Excursion
  • P9C91 Ford Expedition
  • P9C91 Ford Explorer
  • P9C91 Ford Explorer Sport Trac
  • P9C91 Ford F-150
  • P9C91 Ford F-250
  • P9C91 Ford F-350
  • P9C91 Ford Fiesta
  • P9C91 Ford Flex
  • P9C91 Ford Focus
  • P9C91 Ford Focus Electric
  • P9C91 Ford Freestar
  • P9C91 Ford Freestyle
  • P9C91 Ford Fusion
  • P9C91 Ford Fusion Energi
  • P9C91 Ford Fusion Hybrid
  • P9C91 Ford Fusion Plug-In Hybrid
  • P9C91 Ford GT
  • P9C91 Ford Mustang
  • P9C91 Ford Mustang Mach-E
  • P9C91 Ford Mystique
  • P9C91 Ford Probe
  • P9C91 Ford Ranger
  • P9C91 Ford Taurus
  • P9C91 Ford Taurus X
  • P9C91 Ford Tempo
  • P9C91 Ford Thunderbird
  • P9C91 Ford Transit
  • P9C91 Ford Transit Connect
  • P9C91 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.