U1721

U1721 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U1721 Diagnosis

The CHM does not suupport PWM type DRLs. The vehicle has a BHM mismatch with the CHM. Replace the CHM with one that is compatible with the BHM.The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for a wiring fault shorting this circuit to ground or for too many optional circuits spliced into it that is causing the BHM to turn it off.

The suspension proportioning output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for suspension proportioning air solenoid fault, and for air pressure switch short circuit fault.

Ford U1721 Fault Code Meaning :

Ford U1721 Symptoms :

Ford U1721 Reasons :

How To Fix Ford U1721 Trouble Code ?

Which Ford cars have the code U1721?

  • U1721 Ford Aerostar
  • U1721 Ford Bronco
  • U1721 Ford C-Max
  • U1721 Ford C-Max Energi
  • U1721 Ford C-Max Hybrid
  • U1721 Ford Contour
  • U1721 Ford Crown Victoria
  • U1721 Ford EcoSport
  • U1721 Ford Econoline
  • U1721 Ford Edge
  • U1721 Ford Escape
  • U1721 Ford Escape Hybrid
  • U1721 Ford Escort
  • U1721 Ford Everest
  • U1721 Ford Excursion
  • U1721 Ford Expedition
  • U1721 Ford Explorer
  • U1721 Ford Explorer Sport Trac
  • U1721 Ford F-150
  • U1721 Ford F-250
  • U1721 Ford F-350
  • U1721 Ford Fiesta
  • U1721 Ford Flex
  • U1721 Ford Focus
  • U1721 Ford Focus Electric
  • U1721 Ford Freestar
  • U1721 Ford Freestyle
  • U1721 Ford Fusion
  • U1721 Ford Fusion Energi
  • U1721 Ford Fusion Hybrid
  • U1721 Ford Fusion Plug-In Hybrid
  • U1721 Ford GT
  • U1721 Ford Mustang
  • U1721 Ford Mustang Mach-E
  • U1721 Ford Mystique
  • U1721 Ford Probe
  • U1721 Ford Ranger
  • U1721 Ford Taurus
  • U1721 Ford Taurus X
  • U1721 Ford Tempo
  • U1721 Ford Thunderbird
  • U1721 Ford Transit
  • U1721 Ford Transit Connect
  • U1721 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.