C121A

C121A Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C121A Diagnosis

The CHM does not suupport PWM type DRLs. The vehicle has a BHM mismatch with the CHM. Replace the CHM with one that is compatible with the BHM.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 OFF.

The disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.

Ford C121A Fault Code Meaning :

Ford C121A Symptoms :

Ford C121A Reasons :

How To Fix Ford C121A Trouble Code ?

Which Ford cars have the code C121A?

  • C121A Ford Aerostar
  • C121A Ford Bronco
  • C121A Ford C-Max
  • C121A Ford C-Max Energi
  • C121A Ford C-Max Hybrid
  • C121A Ford Contour
  • C121A Ford Crown Victoria
  • C121A Ford EcoSport
  • C121A Ford Econoline
  • C121A Ford Edge
  • C121A Ford Escape
  • C121A Ford Escape Hybrid
  • C121A Ford Escort
  • C121A Ford Everest
  • C121A Ford Excursion
  • C121A Ford Expedition
  • C121A Ford Explorer
  • C121A Ford Explorer Sport Trac
  • C121A Ford F-150
  • C121A Ford F-250
  • C121A Ford F-350
  • C121A Ford Fiesta
  • C121A Ford Flex
  • C121A Ford Focus
  • C121A Ford Focus Electric
  • C121A Ford Freestar
  • C121A Ford Freestyle
  • C121A Ford Fusion
  • C121A Ford Fusion Energi
  • C121A Ford Fusion Hybrid
  • C121A Ford Fusion Plug-In Hybrid
  • C121A Ford GT
  • C121A Ford Mustang
  • C121A Ford Mustang Mach-E
  • C121A Ford Mystique
  • C121A Ford Probe
  • C121A Ford Ranger
  • C121A Ford Taurus
  • C121A Ford Taurus X
  • C121A Ford Tempo
  • C121A Ford Thunderbird
  • C121A Ford Transit
  • C121A Ford Transit Connect
  • C121A 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.