C121E

C121E Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C121E Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open 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 C121E Fault Code Meaning :

Ford C121E Symptoms :

Ford C121E Reasons :

How To Fix Ford C121E Trouble Code ?

Which Ford cars have the code C121E?

  • C121E Ford Aerostar
  • C121E Ford Bronco
  • C121E Ford C-Max
  • C121E Ford C-Max Energi
  • C121E Ford C-Max Hybrid
  • C121E Ford Contour
  • C121E Ford Crown Victoria
  • C121E Ford EcoSport
  • C121E Ford Econoline
  • C121E Ford Edge
  • C121E Ford Escape
  • C121E Ford Escape Hybrid
  • C121E Ford Escort
  • C121E Ford Everest
  • C121E Ford Excursion
  • C121E Ford Expedition
  • C121E Ford Explorer
  • C121E Ford Explorer Sport Trac
  • C121E Ford F-150
  • C121E Ford F-250
  • C121E Ford F-350
  • C121E Ford Fiesta
  • C121E Ford Flex
  • C121E Ford Focus
  • C121E Ford Focus Electric
  • C121E Ford Freestar
  • C121E Ford Freestyle
  • C121E Ford Fusion
  • C121E Ford Fusion Energi
  • C121E Ford Fusion Hybrid
  • C121E Ford Fusion Plug-In Hybrid
  • C121E Ford GT
  • C121E Ford Mustang
  • C121E Ford Mustang Mach-E
  • C121E Ford Mystique
  • C121E Ford Probe
  • C121E Ford Ranger
  • C121E Ford Taurus
  • C121E Ford Taurus X
  • C121E Ford Tempo
  • C121E Ford Thunderbird
  • C121E Ford Transit
  • C121E Ford Transit Connect
  • C121E 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.