B3974

B3974 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B3974 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 B3974 Fault Code Meaning :

Ford B3974 Symptoms :

Ford B3974 Reasons :

How To Fix Ford B3974 Trouble Code ?

Which Ford cars have the code B3974?

  • B3974 Ford Aerostar
  • B3974 Ford Bronco
  • B3974 Ford C-Max
  • B3974 Ford C-Max Energi
  • B3974 Ford C-Max Hybrid
  • B3974 Ford Contour
  • B3974 Ford Crown Victoria
  • B3974 Ford EcoSport
  • B3974 Ford Econoline
  • B3974 Ford Edge
  • B3974 Ford Escape
  • B3974 Ford Escape Hybrid
  • B3974 Ford Escort
  • B3974 Ford Everest
  • B3974 Ford Excursion
  • B3974 Ford Expedition
  • B3974 Ford Explorer
  • B3974 Ford Explorer Sport Trac
  • B3974 Ford F-150
  • B3974 Ford F-250
  • B3974 Ford F-350
  • B3974 Ford Fiesta
  • B3974 Ford Flex
  • B3974 Ford Focus
  • B3974 Ford Focus Electric
  • B3974 Ford Freestar
  • B3974 Ford Freestyle
  • B3974 Ford Fusion
  • B3974 Ford Fusion Energi
  • B3974 Ford Fusion Hybrid
  • B3974 Ford Fusion Plug-In Hybrid
  • B3974 Ford GT
  • B3974 Ford Mustang
  • B3974 Ford Mustang Mach-E
  • B3974 Ford Mystique
  • B3974 Ford Probe
  • B3974 Ford Ranger
  • B3974 Ford Taurus
  • B3974 Ford Taurus X
  • B3974 Ford Tempo
  • B3974 Ford Thunderbird
  • B3974 Ford Transit
  • B3974 Ford Transit Connect
  • B3974 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.