B1791

B1791 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B1791 Diagnosis

The fuse in the main PDM powering this circuit may be open. The root cause could be excessive loads on an output, or a short to ground in the VBAT2 supply to the CHM.Determine if the extra switch is not required for the vehicle or if the switch has been installed but the necessary reference parameter has not been programmed into the BHM.

The BHM measures the current on this circuit when the starter output is commanded ON. This fault indicates the magnetic switch or the wiring between the BHM and the magnetic switch is open circuit.

Ford B1791 Fault Code Meaning :

Ford B1791 Symptoms :

Ford B1791 Reasons :

How To Fix Ford B1791 Trouble Code ?

Which Ford cars have the code B1791?

  • B1791 Ford Aerostar
  • B1791 Ford Bronco
  • B1791 Ford C-Max
  • B1791 Ford C-Max Energi
  • B1791 Ford C-Max Hybrid
  • B1791 Ford Contour
  • B1791 Ford Crown Victoria
  • B1791 Ford EcoSport
  • B1791 Ford Econoline
  • B1791 Ford Edge
  • B1791 Ford Escape
  • B1791 Ford Escape Hybrid
  • B1791 Ford Escort
  • B1791 Ford Everest
  • B1791 Ford Excursion
  • B1791 Ford Expedition
  • B1791 Ford Explorer
  • B1791 Ford Explorer Sport Trac
  • B1791 Ford F-150
  • B1791 Ford F-250
  • B1791 Ford F-350
  • B1791 Ford Fiesta
  • B1791 Ford Flex
  • B1791 Ford Focus
  • B1791 Ford Focus Electric
  • B1791 Ford Freestar
  • B1791 Ford Freestyle
  • B1791 Ford Fusion
  • B1791 Ford Fusion Energi
  • B1791 Ford Fusion Hybrid
  • B1791 Ford Fusion Plug-In Hybrid
  • B1791 Ford GT
  • B1791 Ford Mustang
  • B1791 Ford Mustang Mach-E
  • B1791 Ford Mystique
  • B1791 Ford Probe
  • B1791 Ford Ranger
  • B1791 Ford Taurus
  • B1791 Ford Taurus X
  • B1791 Ford Tempo
  • B1791 Ford Thunderbird
  • B1791 Ford Transit
  • B1791 Ford Transit Connect
  • B1791 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.