U3420

U3420 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U3420 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 ICU reads the wiper switch position and sends the status of the switch to the BHM. This fault becomes active when the ICU reads that both LO speed and HI speed are active at the same time.

Troubleshoot for a wiring short to ground fault on any of the CHM output or BHM output circuits discussed above. The fault remains active until the ignition is turned ON when the fault is no longer present. Some BHM configurations force this circuit off until the ignition switch is cycled.

Ford U3420 Fault Code Meaning :

Ford U3420 Symptoms :

Ford U3420 Reasons :

How To Fix Ford U3420 Trouble Code ?

Which Ford cars have the code U3420?

  • U3420 Ford Aerostar
  • U3420 Ford Bronco
  • U3420 Ford C-Max
  • U3420 Ford C-Max Energi
  • U3420 Ford C-Max Hybrid
  • U3420 Ford Contour
  • U3420 Ford Crown Victoria
  • U3420 Ford EcoSport
  • U3420 Ford Econoline
  • U3420 Ford Edge
  • U3420 Ford Escape
  • U3420 Ford Escape Hybrid
  • U3420 Ford Escort
  • U3420 Ford Everest
  • U3420 Ford Excursion
  • U3420 Ford Expedition
  • U3420 Ford Explorer
  • U3420 Ford Explorer Sport Trac
  • U3420 Ford F-150
  • U3420 Ford F-250
  • U3420 Ford F-350
  • U3420 Ford Fiesta
  • U3420 Ford Flex
  • U3420 Ford Focus
  • U3420 Ford Focus Electric
  • U3420 Ford Freestar
  • U3420 Ford Freestyle
  • U3420 Ford Fusion
  • U3420 Ford Fusion Energi
  • U3420 Ford Fusion Hybrid
  • U3420 Ford Fusion Plug-In Hybrid
  • U3420 Ford GT
  • U3420 Ford Mustang
  • U3420 Ford Mustang Mach-E
  • U3420 Ford Mystique
  • U3420 Ford Probe
  • U3420 Ford Ranger
  • U3420 Ford Taurus
  • U3420 Ford Taurus X
  • U3420 Ford Tempo
  • U3420 Ford Thunderbird
  • U3420 Ford Transit
  • U3420 Ford Transit Connect
  • U3420 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.