B1684

B1684 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B1684 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 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.

When the engine is in higher engine speed and torque condition, the differential pressure over the DPF is expected to rise according to engine speed and torque. If the differential pressure exceeds a threshold then the differential pressure sensor plausibility DTC is set.

Ford B1684 Fault Code Meaning :

Ford B1684 Symptoms :

Ford B1684 Reasons :

How To Fix Ford B1684 Trouble Code ?

Which Ford cars have the code B1684?

  • B1684 Ford Aerostar
  • B1684 Ford Bronco
  • B1684 Ford C-Max
  • B1684 Ford C-Max Energi
  • B1684 Ford C-Max Hybrid
  • B1684 Ford Contour
  • B1684 Ford Crown Victoria
  • B1684 Ford EcoSport
  • B1684 Ford Econoline
  • B1684 Ford Edge
  • B1684 Ford Escape
  • B1684 Ford Escape Hybrid
  • B1684 Ford Escort
  • B1684 Ford Everest
  • B1684 Ford Excursion
  • B1684 Ford Expedition
  • B1684 Ford Explorer
  • B1684 Ford Explorer Sport Trac
  • B1684 Ford F-150
  • B1684 Ford F-250
  • B1684 Ford F-350
  • B1684 Ford Fiesta
  • B1684 Ford Flex
  • B1684 Ford Focus
  • B1684 Ford Focus Electric
  • B1684 Ford Freestar
  • B1684 Ford Freestyle
  • B1684 Ford Fusion
  • B1684 Ford Fusion Energi
  • B1684 Ford Fusion Hybrid
  • B1684 Ford Fusion Plug-In Hybrid
  • B1684 Ford GT
  • B1684 Ford Mustang
  • B1684 Ford Mustang Mach-E
  • B1684 Ford Mystique
  • B1684 Ford Probe
  • B1684 Ford Ranger
  • B1684 Ford Taurus
  • B1684 Ford Taurus X
  • B1684 Ford Tempo
  • B1684 Ford Thunderbird
  • B1684 Ford Transit
  • B1684 Ford Transit Connect
  • B1684 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.