B0420

B0420 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B0420 Diagnosis

This fault indicates that the circuit is drawing more current than it is designed to supply, and possibly there is a wiring fault shorting this circuit to ground. The fault remains active until the ignition is turned ON when the fault is no longer present.The position information for the switch becomes Not Available. Remove the duplicate Smart Switch, then use ServiceLink to verify that the correct Smart Switches are configured for the vehicle.

Engine starting is disabled and other optional functions may be interrupted until the fault is corrected and the ignition switch is cycled.

Ford B0420 Fault Code Meaning :

Ford B0420 Symptoms :

Ford B0420 Reasons :

How To Fix Ford B0420 Trouble Code ?

Which Ford cars have the code B0420?

  • B0420 Ford Aerostar
  • B0420 Ford Bronco
  • B0420 Ford C-Max
  • B0420 Ford C-Max Energi
  • B0420 Ford C-Max Hybrid
  • B0420 Ford Contour
  • B0420 Ford Crown Victoria
  • B0420 Ford EcoSport
  • B0420 Ford Econoline
  • B0420 Ford Edge
  • B0420 Ford Escape
  • B0420 Ford Escape Hybrid
  • B0420 Ford Escort
  • B0420 Ford Everest
  • B0420 Ford Excursion
  • B0420 Ford Expedition
  • B0420 Ford Explorer
  • B0420 Ford Explorer Sport Trac
  • B0420 Ford F-150
  • B0420 Ford F-250
  • B0420 Ford F-350
  • B0420 Ford Fiesta
  • B0420 Ford Flex
  • B0420 Ford Focus
  • B0420 Ford Focus Electric
  • B0420 Ford Freestar
  • B0420 Ford Freestyle
  • B0420 Ford Fusion
  • B0420 Ford Fusion Energi
  • B0420 Ford Fusion Hybrid
  • B0420 Ford Fusion Plug-In Hybrid
  • B0420 Ford GT
  • B0420 Ford Mustang
  • B0420 Ford Mustang Mach-E
  • B0420 Ford Mystique
  • B0420 Ford Probe
  • B0420 Ford Ranger
  • B0420 Ford Taurus
  • B0420 Ford Taurus X
  • B0420 Ford Tempo
  • B0420 Ford Thunderbird
  • B0420 Ford Transit
  • B0420 Ford Transit Connect
  • B0420 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.