P4B81

P4B81 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P4B81 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 P4B81 Fault Code Meaning :

Ford P4B81 Symptoms :

Ford P4B81 Reasons :

How To Fix Ford P4B81 Trouble Code ?

Which Ford cars have the code P4B81?

  • P4B81 Ford Aerostar
  • P4B81 Ford Bronco
  • P4B81 Ford C-Max
  • P4B81 Ford C-Max Energi
  • P4B81 Ford C-Max Hybrid
  • P4B81 Ford Contour
  • P4B81 Ford Crown Victoria
  • P4B81 Ford EcoSport
  • P4B81 Ford Econoline
  • P4B81 Ford Edge
  • P4B81 Ford Escape
  • P4B81 Ford Escape Hybrid
  • P4B81 Ford Escort
  • P4B81 Ford Everest
  • P4B81 Ford Excursion
  • P4B81 Ford Expedition
  • P4B81 Ford Explorer
  • P4B81 Ford Explorer Sport Trac
  • P4B81 Ford F-150
  • P4B81 Ford F-250
  • P4B81 Ford F-350
  • P4B81 Ford Fiesta
  • P4B81 Ford Flex
  • P4B81 Ford Focus
  • P4B81 Ford Focus Electric
  • P4B81 Ford Freestar
  • P4B81 Ford Freestyle
  • P4B81 Ford Fusion
  • P4B81 Ford Fusion Energi
  • P4B81 Ford Fusion Hybrid
  • P4B81 Ford Fusion Plug-In Hybrid
  • P4B81 Ford GT
  • P4B81 Ford Mustang
  • P4B81 Ford Mustang Mach-E
  • P4B81 Ford Mystique
  • P4B81 Ford Probe
  • P4B81 Ford Ranger
  • P4B81 Ford Taurus
  • P4B81 Ford Taurus X
  • P4B81 Ford Tempo
  • P4B81 Ford Thunderbird
  • P4B81 Ford Transit
  • P4B81 Ford Transit Connect
  • P4B81 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.