P9F81

P9F81 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P9F81 Diagnosis

The output circuits that are powered by VBAT2 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. 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 P9F81 Fault Code Meaning :

Ford P9F81 Symptoms :

Ford P9F81 Reasons :

How To Fix Ford P9F81 Trouble Code ?

Which Ford cars have the code P9F81?

  • P9F81 Ford Aerostar
  • P9F81 Ford Bronco
  • P9F81 Ford C-Max
  • P9F81 Ford C-Max Energi
  • P9F81 Ford C-Max Hybrid
  • P9F81 Ford Contour
  • P9F81 Ford Crown Victoria
  • P9F81 Ford EcoSport
  • P9F81 Ford Econoline
  • P9F81 Ford Edge
  • P9F81 Ford Escape
  • P9F81 Ford Escape Hybrid
  • P9F81 Ford Escort
  • P9F81 Ford Everest
  • P9F81 Ford Excursion
  • P9F81 Ford Expedition
  • P9F81 Ford Explorer
  • P9F81 Ford Explorer Sport Trac
  • P9F81 Ford F-150
  • P9F81 Ford F-250
  • P9F81 Ford F-350
  • P9F81 Ford Fiesta
  • P9F81 Ford Flex
  • P9F81 Ford Focus
  • P9F81 Ford Focus Electric
  • P9F81 Ford Freestar
  • P9F81 Ford Freestyle
  • P9F81 Ford Fusion
  • P9F81 Ford Fusion Energi
  • P9F81 Ford Fusion Hybrid
  • P9F81 Ford Fusion Plug-In Hybrid
  • P9F81 Ford GT
  • P9F81 Ford Mustang
  • P9F81 Ford Mustang Mach-E
  • P9F81 Ford Mystique
  • P9F81 Ford Probe
  • P9F81 Ford Ranger
  • P9F81 Ford Taurus
  • P9F81 Ford Taurus X
  • P9F81 Ford Tempo
  • P9F81 Ford Thunderbird
  • P9F81 Ford Transit
  • P9F81 Ford Transit Connect
  • P9F81 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.