P0420

P0420 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P0420 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 P0420 Fault Code Meaning :

Ford P0420 Symptoms :

Ford P0420 Reasons :

How To Fix Ford P0420 Trouble Code ?

Which Ford cars have the code P0420?

  • P0420 Ford Aerostar
  • P0420 Ford Bronco
  • P0420 Ford C-Max
  • P0420 Ford C-Max Energi
  • P0420 Ford C-Max Hybrid
  • P0420 Ford Contour
  • P0420 Ford Crown Victoria
  • P0420 Ford EcoSport
  • P0420 Ford Econoline
  • P0420 Ford Edge
  • P0420 Ford Escape
  • P0420 Ford Escape Hybrid
  • P0420 Ford Escort
  • P0420 Ford Everest
  • P0420 Ford Excursion
  • P0420 Ford Expedition
  • P0420 Ford Explorer
  • P0420 Ford Explorer Sport Trac
  • P0420 Ford F-150
  • P0420 Ford F-250
  • P0420 Ford F-350
  • P0420 Ford Fiesta
  • P0420 Ford Flex
  • P0420 Ford Focus
  • P0420 Ford Focus Electric
  • P0420 Ford Freestar
  • P0420 Ford Freestyle
  • P0420 Ford Fusion
  • P0420 Ford Fusion Energi
  • P0420 Ford Fusion Hybrid
  • P0420 Ford Fusion Plug-In Hybrid
  • P0420 Ford GT
  • P0420 Ford Mustang
  • P0420 Ford Mustang Mach-E
  • P0420 Ford Mystique
  • P0420 Ford Probe
  • P0420 Ford Ranger
  • P0420 Ford Taurus
  • P0420 Ford Taurus X
  • P0420 Ford Tempo
  • P0420 Ford Thunderbird
  • P0420 Ford Transit
  • P0420 Ford Transit Connect
  • P0420 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.