P0400

P0400 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P0400 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 BHM is detecting more than one smart switch with the same ID number present on the vehicle. The outputs controlled by the switch and the indicator in the switch are commanded OFF.

The disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.

Ford P0400 Fault Code Meaning :

Ford P0400 Symptoms :

Ford P0400 Reasons :

How To Fix Ford P0400 Trouble Code ?

Which Ford cars have the code P0400?

  • P0400 Ford Aerostar
  • P0400 Ford Bronco
  • P0400 Ford C-Max
  • P0400 Ford C-Max Energi
  • P0400 Ford C-Max Hybrid
  • P0400 Ford Contour
  • P0400 Ford Crown Victoria
  • P0400 Ford EcoSport
  • P0400 Ford Econoline
  • P0400 Ford Edge
  • P0400 Ford Escape
  • P0400 Ford Escape Hybrid
  • P0400 Ford Escort
  • P0400 Ford Everest
  • P0400 Ford Excursion
  • P0400 Ford Expedition
  • P0400 Ford Explorer
  • P0400 Ford Explorer Sport Trac
  • P0400 Ford F-150
  • P0400 Ford F-250
  • P0400 Ford F-350
  • P0400 Ford Fiesta
  • P0400 Ford Flex
  • P0400 Ford Focus
  • P0400 Ford Focus Electric
  • P0400 Ford Freestar
  • P0400 Ford Freestyle
  • P0400 Ford Fusion
  • P0400 Ford Fusion Energi
  • P0400 Ford Fusion Hybrid
  • P0400 Ford Fusion Plug-In Hybrid
  • P0400 Ford GT
  • P0400 Ford Mustang
  • P0400 Ford Mustang Mach-E
  • P0400 Ford Mystique
  • P0400 Ford Probe
  • P0400 Ford Ranger
  • P0400 Ford Taurus
  • P0400 Ford Taurus X
  • P0400 Ford Tempo
  • P0400 Ford Thunderbird
  • P0400 Ford Transit
  • P0400 Ford Transit Connect
  • P0400 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.