P0644

P0644 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P0644 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 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 P0644 Fault Code Meaning :

Ford P0644 Symptoms :

Ford P0644 Reasons :

How To Fix Ford P0644 Trouble Code ?

Which Ford cars have the code P0644?

  • P0644 Ford Aerostar
  • P0644 Ford Bronco
  • P0644 Ford C-Max
  • P0644 Ford C-Max Energi
  • P0644 Ford C-Max Hybrid
  • P0644 Ford Contour
  • P0644 Ford Crown Victoria
  • P0644 Ford EcoSport
  • P0644 Ford Econoline
  • P0644 Ford Edge
  • P0644 Ford Escape
  • P0644 Ford Escape Hybrid
  • P0644 Ford Escort
  • P0644 Ford Everest
  • P0644 Ford Excursion
  • P0644 Ford Expedition
  • P0644 Ford Explorer
  • P0644 Ford Explorer Sport Trac
  • P0644 Ford F-150
  • P0644 Ford F-250
  • P0644 Ford F-350
  • P0644 Ford Fiesta
  • P0644 Ford Flex
  • P0644 Ford Focus
  • P0644 Ford Focus Electric
  • P0644 Ford Freestar
  • P0644 Ford Freestyle
  • P0644 Ford Fusion
  • P0644 Ford Fusion Energi
  • P0644 Ford Fusion Hybrid
  • P0644 Ford Fusion Plug-In Hybrid
  • P0644 Ford GT
  • P0644 Ford Mustang
  • P0644 Ford Mustang Mach-E
  • P0644 Ford Mystique
  • P0644 Ford Probe
  • P0644 Ford Ranger
  • P0644 Ford Taurus
  • P0644 Ford Taurus X
  • P0644 Ford Tempo
  • P0644 Ford Thunderbird
  • P0644 Ford Transit
  • P0644 Ford Transit Connect
  • P0644 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.