P3891

P3891 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3891 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 is detecting more than one smart switch with the same ID number present on the vehicle. The outputs controlled by the switch and the indicator in the switch are commanded OFF.

The top-of-clutch switch and bottom-of-clutch switch are both measured as closed at the same time. Troubleshoot for clutch switch shorted, or for a wiring fault between the clutch switch and the BHM.

Ford P3891 Fault Code Meaning :

Ford P3891 Symptoms :

Ford P3891 Reasons :

How To Fix Ford P3891 Trouble Code ?

Which Ford cars have the code P3891?

  • P3891 Ford Aerostar
  • P3891 Ford Bronco
  • P3891 Ford C-Max
  • P3891 Ford C-Max Energi
  • P3891 Ford C-Max Hybrid
  • P3891 Ford Contour
  • P3891 Ford Crown Victoria
  • P3891 Ford EcoSport
  • P3891 Ford Econoline
  • P3891 Ford Edge
  • P3891 Ford Escape
  • P3891 Ford Escape Hybrid
  • P3891 Ford Escort
  • P3891 Ford Everest
  • P3891 Ford Excursion
  • P3891 Ford Expedition
  • P3891 Ford Explorer
  • P3891 Ford Explorer Sport Trac
  • P3891 Ford F-150
  • P3891 Ford F-250
  • P3891 Ford F-350
  • P3891 Ford Fiesta
  • P3891 Ford Flex
  • P3891 Ford Focus
  • P3891 Ford Focus Electric
  • P3891 Ford Freestar
  • P3891 Ford Freestyle
  • P3891 Ford Fusion
  • P3891 Ford Fusion Energi
  • P3891 Ford Fusion Hybrid
  • P3891 Ford Fusion Plug-In Hybrid
  • P3891 Ford GT
  • P3891 Ford Mustang
  • P3891 Ford Mustang Mach-E
  • P3891 Ford Mystique
  • P3891 Ford Probe
  • P3891 Ford Ranger
  • P3891 Ford Taurus
  • P3891 Ford Taurus X
  • P3891 Ford Tempo
  • P3891 Ford Thunderbird
  • P3891 Ford Transit
  • P3891 Ford Transit Connect
  • P3891 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.