U0400

U0400 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U0400 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 U0400 Fault Code Meaning :

Ford U0400 Symptoms :

Ford U0400 Reasons :

How To Fix Ford U0400 Trouble Code ?

Which Ford cars have the code U0400?

  • U0400 Ford Aerostar
  • U0400 Ford Bronco
  • U0400 Ford C-Max
  • U0400 Ford C-Max Energi
  • U0400 Ford C-Max Hybrid
  • U0400 Ford Contour
  • U0400 Ford Crown Victoria
  • U0400 Ford EcoSport
  • U0400 Ford Econoline
  • U0400 Ford Edge
  • U0400 Ford Escape
  • U0400 Ford Escape Hybrid
  • U0400 Ford Escort
  • U0400 Ford Everest
  • U0400 Ford Excursion
  • U0400 Ford Expedition
  • U0400 Ford Explorer
  • U0400 Ford Explorer Sport Trac
  • U0400 Ford F-150
  • U0400 Ford F-250
  • U0400 Ford F-350
  • U0400 Ford Fiesta
  • U0400 Ford Flex
  • U0400 Ford Focus
  • U0400 Ford Focus Electric
  • U0400 Ford Freestar
  • U0400 Ford Freestyle
  • U0400 Ford Fusion
  • U0400 Ford Fusion Energi
  • U0400 Ford Fusion Hybrid
  • U0400 Ford Fusion Plug-In Hybrid
  • U0400 Ford GT
  • U0400 Ford Mustang
  • U0400 Ford Mustang Mach-E
  • U0400 Ford Mystique
  • U0400 Ford Probe
  • U0400 Ford Ranger
  • U0400 Ford Taurus
  • U0400 Ford Taurus X
  • U0400 Ford Tempo
  • U0400 Ford Thunderbird
  • U0400 Ford Transit
  • U0400 Ford Transit Connect
  • U0400 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.