P3721

P3721 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P3721 Diagnosis

The axle lift 2 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for axle lift 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.

A comparison of pressures from all sensors is made. The smallest difference between the three is determined and a reference pressure is calculated. The Barometric pressure sensor value is compared to the reference value and if the difference is above the threshold a DTC is reported.

Ford P3721 Fault Code Meaning :

Ford P3721 Symptoms :

Ford P3721 Reasons :

How To Fix Ford P3721 Trouble Code ?

Which Ford cars have the code P3721?

  • P3721 Ford Aerostar
  • P3721 Ford Bronco
  • P3721 Ford C-Max
  • P3721 Ford C-Max Energi
  • P3721 Ford C-Max Hybrid
  • P3721 Ford Contour
  • P3721 Ford Crown Victoria
  • P3721 Ford EcoSport
  • P3721 Ford Econoline
  • P3721 Ford Edge
  • P3721 Ford Escape
  • P3721 Ford Escape Hybrid
  • P3721 Ford Escort
  • P3721 Ford Everest
  • P3721 Ford Excursion
  • P3721 Ford Expedition
  • P3721 Ford Explorer
  • P3721 Ford Explorer Sport Trac
  • P3721 Ford F-150
  • P3721 Ford F-250
  • P3721 Ford F-350
  • P3721 Ford Fiesta
  • P3721 Ford Flex
  • P3721 Ford Focus
  • P3721 Ford Focus Electric
  • P3721 Ford Freestar
  • P3721 Ford Freestyle
  • P3721 Ford Fusion
  • P3721 Ford Fusion Energi
  • P3721 Ford Fusion Hybrid
  • P3721 Ford Fusion Plug-In Hybrid
  • P3721 Ford GT
  • P3721 Ford Mustang
  • P3721 Ford Mustang Mach-E
  • P3721 Ford Mystique
  • P3721 Ford Probe
  • P3721 Ford Ranger
  • P3721 Ford Taurus
  • P3721 Ford Taurus X
  • P3721 Ford Tempo
  • P3721 Ford Thunderbird
  • P3721 Ford Transit
  • P3721 Ford Transit Connect
  • P3721 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.