P21B8

P21B8 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P21B8 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.Determine if the extra switch is not required for the vehicle or if the switch has been installed but the necessary reference parameter has not been programmed into the BHM.

The BHM measures the current on this circuit when the starter output is commanded ON. This fault indicates the magnetic switch or the wiring between the BHM and the magnetic switch is open circuit.

Ford P21B8 Fault Code Meaning :

Ford P21B8 Symptoms :

Ford P21B8 Reasons :

How To Fix Ford P21B8 Trouble Code ?

Which Ford cars have the code P21B8?

  • P21B8 Ford Aerostar
  • P21B8 Ford Bronco
  • P21B8 Ford C-Max
  • P21B8 Ford C-Max Energi
  • P21B8 Ford C-Max Hybrid
  • P21B8 Ford Contour
  • P21B8 Ford Crown Victoria
  • P21B8 Ford EcoSport
  • P21B8 Ford Econoline
  • P21B8 Ford Edge
  • P21B8 Ford Escape
  • P21B8 Ford Escape Hybrid
  • P21B8 Ford Escort
  • P21B8 Ford Everest
  • P21B8 Ford Excursion
  • P21B8 Ford Expedition
  • P21B8 Ford Explorer
  • P21B8 Ford Explorer Sport Trac
  • P21B8 Ford F-150
  • P21B8 Ford F-250
  • P21B8 Ford F-350
  • P21B8 Ford Fiesta
  • P21B8 Ford Flex
  • P21B8 Ford Focus
  • P21B8 Ford Focus Electric
  • P21B8 Ford Freestar
  • P21B8 Ford Freestyle
  • P21B8 Ford Fusion
  • P21B8 Ford Fusion Energi
  • P21B8 Ford Fusion Hybrid
  • P21B8 Ford Fusion Plug-In Hybrid
  • P21B8 Ford GT
  • P21B8 Ford Mustang
  • P21B8 Ford Mustang Mach-E
  • P21B8 Ford Mystique
  • P21B8 Ford Probe
  • P21B8 Ford Ranger
  • P21B8 Ford Taurus
  • P21B8 Ford Taurus X
  • P21B8 Ford Tempo
  • P21B8 Ford Thunderbird
  • P21B8 Ford Transit
  • P21B8 Ford Transit Connect
  • P21B8 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.