B0644

B0644 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B0644 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 FF.

The End of Frame air output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for an End of Frame air solenoid fault, and for an air pressure switch short circuit fault.

Ford B0644 Fault Code Meaning :

Ford B0644 Symptoms :

Ford B0644 Reasons :

How To Fix Ford B0644 Trouble Code ?

Which Ford cars have the code B0644?

  • B0644 Ford Aerostar
  • B0644 Ford Bronco
  • B0644 Ford C-Max
  • B0644 Ford C-Max Energi
  • B0644 Ford C-Max Hybrid
  • B0644 Ford Contour
  • B0644 Ford Crown Victoria
  • B0644 Ford EcoSport
  • B0644 Ford Econoline
  • B0644 Ford Edge
  • B0644 Ford Escape
  • B0644 Ford Escape Hybrid
  • B0644 Ford Escort
  • B0644 Ford Everest
  • B0644 Ford Excursion
  • B0644 Ford Expedition
  • B0644 Ford Explorer
  • B0644 Ford Explorer Sport Trac
  • B0644 Ford F-150
  • B0644 Ford F-250
  • B0644 Ford F-350
  • B0644 Ford Fiesta
  • B0644 Ford Flex
  • B0644 Ford Focus
  • B0644 Ford Focus Electric
  • B0644 Ford Freestar
  • B0644 Ford Freestyle
  • B0644 Ford Fusion
  • B0644 Ford Fusion Energi
  • B0644 Ford Fusion Hybrid
  • B0644 Ford Fusion Plug-In Hybrid
  • B0644 Ford GT
  • B0644 Ford Mustang
  • B0644 Ford Mustang Mach-E
  • B0644 Ford Mystique
  • B0644 Ford Probe
  • B0644 Ford Ranger
  • B0644 Ford Taurus
  • B0644 Ford Taurus X
  • B0644 Ford Tempo
  • B0644 Ford Thunderbird
  • B0644 Ford Transit
  • B0644 Ford Transit Connect
  • B0644 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.