P939B

P939B Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P939B 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 P939B Fault Code Meaning :

Ford P939B Symptoms :

Ford P939B Reasons :

How To Fix Ford P939B Trouble Code ?

Which Ford cars have the code P939B?

  • P939B Ford Aerostar
  • P939B Ford Bronco
  • P939B Ford C-Max
  • P939B Ford C-Max Energi
  • P939B Ford C-Max Hybrid
  • P939B Ford Contour
  • P939B Ford Crown Victoria
  • P939B Ford EcoSport
  • P939B Ford Econoline
  • P939B Ford Edge
  • P939B Ford Escape
  • P939B Ford Escape Hybrid
  • P939B Ford Escort
  • P939B Ford Everest
  • P939B Ford Excursion
  • P939B Ford Expedition
  • P939B Ford Explorer
  • P939B Ford Explorer Sport Trac
  • P939B Ford F-150
  • P939B Ford F-250
  • P939B Ford F-350
  • P939B Ford Fiesta
  • P939B Ford Flex
  • P939B Ford Focus
  • P939B Ford Focus Electric
  • P939B Ford Freestar
  • P939B Ford Freestyle
  • P939B Ford Fusion
  • P939B Ford Fusion Energi
  • P939B Ford Fusion Hybrid
  • P939B Ford Fusion Plug-In Hybrid
  • P939B Ford GT
  • P939B Ford Mustang
  • P939B Ford Mustang Mach-E
  • P939B Ford Mystique
  • P939B Ford Probe
  • P939B Ford Ranger
  • P939B Ford Taurus
  • P939B Ford Taurus X
  • P939B Ford Tempo
  • P939B Ford Thunderbird
  • P939B Ford Transit
  • P939B Ford Transit Connect
  • P939B 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.