B3939

B3939 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B3939 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 position information for the switch becomes Not Available. Remove the duplicate Smart Switch, then use ServiceLink to verify that the correct Smart Switches are configured for the vehicle.

Engine starting is disabled and other optional functions may be interrupted until the fault is corrected and the ignition switch is cycled.

Ford B3939 Fault Code Meaning :

Ford B3939 Symptoms :

Ford B3939 Reasons :

How To Fix Ford B3939 Trouble Code ?

Which Ford cars have the code B3939?

  • B3939 Ford Aerostar
  • B3939 Ford Bronco
  • B3939 Ford C-Max
  • B3939 Ford C-Max Energi
  • B3939 Ford C-Max Hybrid
  • B3939 Ford Contour
  • B3939 Ford Crown Victoria
  • B3939 Ford EcoSport
  • B3939 Ford Econoline
  • B3939 Ford Edge
  • B3939 Ford Escape
  • B3939 Ford Escape Hybrid
  • B3939 Ford Escort
  • B3939 Ford Everest
  • B3939 Ford Excursion
  • B3939 Ford Expedition
  • B3939 Ford Explorer
  • B3939 Ford Explorer Sport Trac
  • B3939 Ford F-150
  • B3939 Ford F-250
  • B3939 Ford F-350
  • B3939 Ford Fiesta
  • B3939 Ford Flex
  • B3939 Ford Focus
  • B3939 Ford Focus Electric
  • B3939 Ford Freestar
  • B3939 Ford Freestyle
  • B3939 Ford Fusion
  • B3939 Ford Fusion Energi
  • B3939 Ford Fusion Hybrid
  • B3939 Ford Fusion Plug-In Hybrid
  • B3939 Ford GT
  • B3939 Ford Mustang
  • B3939 Ford Mustang Mach-E
  • B3939 Ford Mystique
  • B3939 Ford Probe
  • B3939 Ford Ranger
  • B3939 Ford Taurus
  • B3939 Ford Taurus X
  • B3939 Ford Tempo
  • B3939 Ford Thunderbird
  • B3939 Ford Transit
  • B3939 Ford Transit Connect
  • B3939 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.