P0121

P0121 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P0121 Diagnosis

The output circuits that are powered by VBAT3 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. The fuse in the main PDM powering this circuit may be open.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 P0121 Fault Code Meaning :

Ford P0121 Symptoms :

Ford P0121 Reasons :

How To Fix Ford P0121 Trouble Code ?

Which Ford cars have the code P0121?

  • P0121 Ford Aerostar
  • P0121 Ford Bronco
  • P0121 Ford C-Max
  • P0121 Ford C-Max Energi
  • P0121 Ford C-Max Hybrid
  • P0121 Ford Contour
  • P0121 Ford Crown Victoria
  • P0121 Ford EcoSport
  • P0121 Ford Econoline
  • P0121 Ford Edge
  • P0121 Ford Escape
  • P0121 Ford Escape Hybrid
  • P0121 Ford Escort
  • P0121 Ford Everest
  • P0121 Ford Excursion
  • P0121 Ford Expedition
  • P0121 Ford Explorer
  • P0121 Ford Explorer Sport Trac
  • P0121 Ford F-150
  • P0121 Ford F-250
  • P0121 Ford F-350
  • P0121 Ford Fiesta
  • P0121 Ford Flex
  • P0121 Ford Focus
  • P0121 Ford Focus Electric
  • P0121 Ford Freestar
  • P0121 Ford Freestyle
  • P0121 Ford Fusion
  • P0121 Ford Fusion Energi
  • P0121 Ford Fusion Hybrid
  • P0121 Ford Fusion Plug-In Hybrid
  • P0121 Ford GT
  • P0121 Ford Mustang
  • P0121 Ford Mustang Mach-E
  • P0121 Ford Mystique
  • P0121 Ford Probe
  • P0121 Ford Ranger
  • P0121 Ford Taurus
  • P0121 Ford Taurus X
  • P0121 Ford Tempo
  • P0121 Ford Thunderbird
  • P0121 Ford Transit
  • P0121 Ford Transit Connect
  • P0121 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.