P1891

P1891 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P1891 Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open circuit fault.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 disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.

Ford P1891 Fault Code Meaning :

Ford P1891 Symptoms :

Ford P1891 Reasons :

How To Fix Ford P1891 Trouble Code ?

Which Ford cars have the code P1891?

  • P1891 Ford Aerostar
  • P1891 Ford Bronco
  • P1891 Ford C-Max
  • P1891 Ford C-Max Energi
  • P1891 Ford C-Max Hybrid
  • P1891 Ford Contour
  • P1891 Ford Crown Victoria
  • P1891 Ford EcoSport
  • P1891 Ford Econoline
  • P1891 Ford Edge
  • P1891 Ford Escape
  • P1891 Ford Escape Hybrid
  • P1891 Ford Escort
  • P1891 Ford Everest
  • P1891 Ford Excursion
  • P1891 Ford Expedition
  • P1891 Ford Explorer
  • P1891 Ford Explorer Sport Trac
  • P1891 Ford F-150
  • P1891 Ford F-250
  • P1891 Ford F-350
  • P1891 Ford Fiesta
  • P1891 Ford Flex
  • P1891 Ford Focus
  • P1891 Ford Focus Electric
  • P1891 Ford Freestar
  • P1891 Ford Freestyle
  • P1891 Ford Fusion
  • P1891 Ford Fusion Energi
  • P1891 Ford Fusion Hybrid
  • P1891 Ford Fusion Plug-In Hybrid
  • P1891 Ford GT
  • P1891 Ford Mustang
  • P1891 Ford Mustang Mach-E
  • P1891 Ford Mystique
  • P1891 Ford Probe
  • P1891 Ford Ranger
  • P1891 Ford Taurus
  • P1891 Ford Taurus X
  • P1891 Ford Tempo
  • P1891 Ford Thunderbird
  • P1891 Ford Transit
  • P1891 Ford Transit Connect
  • P1891 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.