U3781

U3781 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3781 Diagnosis

The PTO 1 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for PTO 2 air solenoid fault, and for air pressure switch short circuit fault.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 U3781 Fault Code Meaning :

Ford U3781 Symptoms :

Ford U3781 Reasons :

How To Fix Ford U3781 Trouble Code ?

Which Ford cars have the code U3781?

  • U3781 Ford Aerostar
  • U3781 Ford Bronco
  • U3781 Ford C-Max
  • U3781 Ford C-Max Energi
  • U3781 Ford C-Max Hybrid
  • U3781 Ford Contour
  • U3781 Ford Crown Victoria
  • U3781 Ford EcoSport
  • U3781 Ford Econoline
  • U3781 Ford Edge
  • U3781 Ford Escape
  • U3781 Ford Escape Hybrid
  • U3781 Ford Escort
  • U3781 Ford Everest
  • U3781 Ford Excursion
  • U3781 Ford Expedition
  • U3781 Ford Explorer
  • U3781 Ford Explorer Sport Trac
  • U3781 Ford F-150
  • U3781 Ford F-250
  • U3781 Ford F-350
  • U3781 Ford Fiesta
  • U3781 Ford Flex
  • U3781 Ford Focus
  • U3781 Ford Focus Electric
  • U3781 Ford Freestar
  • U3781 Ford Freestyle
  • U3781 Ford Fusion
  • U3781 Ford Fusion Energi
  • U3781 Ford Fusion Hybrid
  • U3781 Ford Fusion Plug-In Hybrid
  • U3781 Ford GT
  • U3781 Ford Mustang
  • U3781 Ford Mustang Mach-E
  • U3781 Ford Mystique
  • U3781 Ford Probe
  • U3781 Ford Ranger
  • U3781 Ford Taurus
  • U3781 Ford Taurus X
  • U3781 Ford Tempo
  • U3781 Ford Thunderbird
  • U3781 Ford Transit
  • U3781 Ford Transit Connect
  • U3781 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.