C121C

C121C Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C121C Diagnosis

This fault indicates that the circuit is drawing more current than it is designed to supply, and possibly there is a wiring fault shorting this circuit to ground. The fault remains active until the ignition is turned ON when the fault is no longer present.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 C121C Fault Code Meaning :

Ford C121C Symptoms :

Ford C121C Reasons :

How To Fix Ford C121C Trouble Code ?

Which Ford cars have the code C121C?

  • C121C Ford Aerostar
  • C121C Ford Bronco
  • C121C Ford C-Max
  • C121C Ford C-Max Energi
  • C121C Ford C-Max Hybrid
  • C121C Ford Contour
  • C121C Ford Crown Victoria
  • C121C Ford EcoSport
  • C121C Ford Econoline
  • C121C Ford Edge
  • C121C Ford Escape
  • C121C Ford Escape Hybrid
  • C121C Ford Escort
  • C121C Ford Everest
  • C121C Ford Excursion
  • C121C Ford Expedition
  • C121C Ford Explorer
  • C121C Ford Explorer Sport Trac
  • C121C Ford F-150
  • C121C Ford F-250
  • C121C Ford F-350
  • C121C Ford Fiesta
  • C121C Ford Flex
  • C121C Ford Focus
  • C121C Ford Focus Electric
  • C121C Ford Freestar
  • C121C Ford Freestyle
  • C121C Ford Fusion
  • C121C Ford Fusion Energi
  • C121C Ford Fusion Hybrid
  • C121C Ford Fusion Plug-In Hybrid
  • C121C Ford GT
  • C121C Ford Mustang
  • C121C Ford Mustang Mach-E
  • C121C Ford Mystique
  • C121C Ford Probe
  • C121C Ford Ranger
  • C121C Ford Taurus
  • C121C Ford Taurus X
  • C121C Ford Tempo
  • C121C Ford Thunderbird
  • C121C Ford Transit
  • C121C Ford Transit Connect
  • C121C 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.