C121F

C121F Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C121F 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 FF.

The BHM drives the 5 cab overhead clearance and ID lamps from connector B5 pin C on circuit 46. All other marker and tail lamps are driven from BHM connector B1,K on circuit 23. This circuit connects to the CHM as an input at connector J3,P.

Ford C121F Fault Code Meaning :

Ford C121F Symptoms :

Ford C121F Reasons :

How To Fix Ford C121F Trouble Code ?

Which Ford cars have the code C121F?

  • C121F Ford Aerostar
  • C121F Ford Bronco
  • C121F Ford C-Max
  • C121F Ford C-Max Energi
  • C121F Ford C-Max Hybrid
  • C121F Ford Contour
  • C121F Ford Crown Victoria
  • C121F Ford EcoSport
  • C121F Ford Econoline
  • C121F Ford Edge
  • C121F Ford Escape
  • C121F Ford Escape Hybrid
  • C121F Ford Escort
  • C121F Ford Everest
  • C121F Ford Excursion
  • C121F Ford Expedition
  • C121F Ford Explorer
  • C121F Ford Explorer Sport Trac
  • C121F Ford F-150
  • C121F Ford F-250
  • C121F Ford F-350
  • C121F Ford Fiesta
  • C121F Ford Flex
  • C121F Ford Focus
  • C121F Ford Focus Electric
  • C121F Ford Freestar
  • C121F Ford Freestyle
  • C121F Ford Fusion
  • C121F Ford Fusion Energi
  • C121F Ford Fusion Hybrid
  • C121F Ford Fusion Plug-In Hybrid
  • C121F Ford GT
  • C121F Ford Mustang
  • C121F Ford Mustang Mach-E
  • C121F Ford Mystique
  • C121F Ford Probe
  • C121F Ford Ranger
  • C121F Ford Taurus
  • C121F Ford Taurus X
  • C121F Ford Tempo
  • C121F Ford Thunderbird
  • C121F Ford Transit
  • C121F Ford Transit Connect
  • C121F 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.