C1688

C1688 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C1688 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.

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 C1688 Fault Code Meaning :

Ford C1688 Symptoms :

Ford C1688 Reasons :

How To Fix Ford C1688 Trouble Code ?

Which Ford cars have the code C1688?

  • C1688 Ford Aerostar
  • C1688 Ford Bronco
  • C1688 Ford C-Max
  • C1688 Ford C-Max Energi
  • C1688 Ford C-Max Hybrid
  • C1688 Ford Contour
  • C1688 Ford Crown Victoria
  • C1688 Ford EcoSport
  • C1688 Ford Econoline
  • C1688 Ford Edge
  • C1688 Ford Escape
  • C1688 Ford Escape Hybrid
  • C1688 Ford Escort
  • C1688 Ford Everest
  • C1688 Ford Excursion
  • C1688 Ford Expedition
  • C1688 Ford Explorer
  • C1688 Ford Explorer Sport Trac
  • C1688 Ford F-150
  • C1688 Ford F-250
  • C1688 Ford F-350
  • C1688 Ford Fiesta
  • C1688 Ford Flex
  • C1688 Ford Focus
  • C1688 Ford Focus Electric
  • C1688 Ford Freestar
  • C1688 Ford Freestyle
  • C1688 Ford Fusion
  • C1688 Ford Fusion Energi
  • C1688 Ford Fusion Hybrid
  • C1688 Ford Fusion Plug-In Hybrid
  • C1688 Ford GT
  • C1688 Ford Mustang
  • C1688 Ford Mustang Mach-E
  • C1688 Ford Mystique
  • C1688 Ford Probe
  • C1688 Ford Ranger
  • C1688 Ford Taurus
  • C1688 Ford Taurus X
  • C1688 Ford Tempo
  • C1688 Ford Thunderbird
  • C1688 Ford Transit
  • C1688 Ford Transit Connect
  • C1688 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.