P121F

P121F Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P121F 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 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 P121F Fault Code Meaning :

Ford P121F Symptoms :

Ford P121F Reasons :

How To Fix Ford P121F Trouble Code ?

Which Ford cars have the code P121F?

  • P121F Ford Aerostar
  • P121F Ford Bronco
  • P121F Ford C-Max
  • P121F Ford C-Max Energi
  • P121F Ford C-Max Hybrid
  • P121F Ford Contour
  • P121F Ford Crown Victoria
  • P121F Ford EcoSport
  • P121F Ford Econoline
  • P121F Ford Edge
  • P121F Ford Escape
  • P121F Ford Escape Hybrid
  • P121F Ford Escort
  • P121F Ford Everest
  • P121F Ford Excursion
  • P121F Ford Expedition
  • P121F Ford Explorer
  • P121F Ford Explorer Sport Trac
  • P121F Ford F-150
  • P121F Ford F-250
  • P121F Ford F-350
  • P121F Ford Fiesta
  • P121F Ford Flex
  • P121F Ford Focus
  • P121F Ford Focus Electric
  • P121F Ford Freestar
  • P121F Ford Freestyle
  • P121F Ford Fusion
  • P121F Ford Fusion Energi
  • P121F Ford Fusion Hybrid
  • P121F Ford Fusion Plug-In Hybrid
  • P121F Ford GT
  • P121F Ford Mustang
  • P121F Ford Mustang Mach-E
  • P121F Ford Mystique
  • P121F Ford Probe
  • P121F Ford Ranger
  • P121F Ford Taurus
  • P121F Ford Taurus X
  • P121F Ford Tempo
  • P121F Ford Thunderbird
  • P121F Ford Transit
  • P121F Ford Transit Connect
  • P121F 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.