C3721

C3721 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C3721 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.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 C3721 Fault Code Meaning :

Ford C3721 Symptoms :

Ford C3721 Reasons :

How To Fix Ford C3721 Trouble Code ?

Which Ford cars have the code C3721?

  • C3721 Ford Aerostar
  • C3721 Ford Bronco
  • C3721 Ford C-Max
  • C3721 Ford C-Max Energi
  • C3721 Ford C-Max Hybrid
  • C3721 Ford Contour
  • C3721 Ford Crown Victoria
  • C3721 Ford EcoSport
  • C3721 Ford Econoline
  • C3721 Ford Edge
  • C3721 Ford Escape
  • C3721 Ford Escape Hybrid
  • C3721 Ford Escort
  • C3721 Ford Everest
  • C3721 Ford Excursion
  • C3721 Ford Expedition
  • C3721 Ford Explorer
  • C3721 Ford Explorer Sport Trac
  • C3721 Ford F-150
  • C3721 Ford F-250
  • C3721 Ford F-350
  • C3721 Ford Fiesta
  • C3721 Ford Flex
  • C3721 Ford Focus
  • C3721 Ford Focus Electric
  • C3721 Ford Freestar
  • C3721 Ford Freestyle
  • C3721 Ford Fusion
  • C3721 Ford Fusion Energi
  • C3721 Ford Fusion Hybrid
  • C3721 Ford Fusion Plug-In Hybrid
  • C3721 Ford GT
  • C3721 Ford Mustang
  • C3721 Ford Mustang Mach-E
  • C3721 Ford Mystique
  • C3721 Ford Probe
  • C3721 Ford Ranger
  • C3721 Ford Taurus
  • C3721 Ford Taurus X
  • C3721 Ford Tempo
  • C3721 Ford Thunderbird
  • C3721 Ford Transit
  • C3721 Ford Transit Connect
  • C3721 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.