C0420

C0420 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C0420 Diagnosis

The fault remains active until the ignition is turned ON when the fault is no longer present. Some BHM configurations force this circuit off until the ignition switch is cycled.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 C0420 Fault Code Meaning :

Ford C0420 Symptoms :

Ford C0420 Reasons :

How To Fix Ford C0420 Trouble Code ?

Which Ford cars have the code C0420?

  • C0420 Ford Aerostar
  • C0420 Ford Bronco
  • C0420 Ford C-Max
  • C0420 Ford C-Max Energi
  • C0420 Ford C-Max Hybrid
  • C0420 Ford Contour
  • C0420 Ford Crown Victoria
  • C0420 Ford EcoSport
  • C0420 Ford Econoline
  • C0420 Ford Edge
  • C0420 Ford Escape
  • C0420 Ford Escape Hybrid
  • C0420 Ford Escort
  • C0420 Ford Everest
  • C0420 Ford Excursion
  • C0420 Ford Expedition
  • C0420 Ford Explorer
  • C0420 Ford Explorer Sport Trac
  • C0420 Ford F-150
  • C0420 Ford F-250
  • C0420 Ford F-350
  • C0420 Ford Fiesta
  • C0420 Ford Flex
  • C0420 Ford Focus
  • C0420 Ford Focus Electric
  • C0420 Ford Freestar
  • C0420 Ford Freestyle
  • C0420 Ford Fusion
  • C0420 Ford Fusion Energi
  • C0420 Ford Fusion Hybrid
  • C0420 Ford Fusion Plug-In Hybrid
  • C0420 Ford GT
  • C0420 Ford Mustang
  • C0420 Ford Mustang Mach-E
  • C0420 Ford Mystique
  • C0420 Ford Probe
  • C0420 Ford Ranger
  • C0420 Ford Taurus
  • C0420 Ford Taurus X
  • C0420 Ford Tempo
  • C0420 Ford Thunderbird
  • C0420 Ford Transit
  • C0420 Ford Transit Connect
  • C0420 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.