P7B21

P7B21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P7B21 Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open circuit fault.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.

This circuit connects to the CHM as an input at connector J3,P. The CHM passes the signal through to power the tail lamps and marker lamps from connector C2 pin G and also from connector C1 pins D, E, and F.

Ford P7B21 Fault Code Meaning :

Ford P7B21 Symptoms :

Ford P7B21 Reasons :

How To Fix Ford P7B21 Trouble Code ?

Which Ford cars have the code P7B21?

  • P7B21 Ford Aerostar
  • P7B21 Ford Bronco
  • P7B21 Ford C-Max
  • P7B21 Ford C-Max Energi
  • P7B21 Ford C-Max Hybrid
  • P7B21 Ford Contour
  • P7B21 Ford Crown Victoria
  • P7B21 Ford EcoSport
  • P7B21 Ford Econoline
  • P7B21 Ford Edge
  • P7B21 Ford Escape
  • P7B21 Ford Escape Hybrid
  • P7B21 Ford Escort
  • P7B21 Ford Everest
  • P7B21 Ford Excursion
  • P7B21 Ford Expedition
  • P7B21 Ford Explorer
  • P7B21 Ford Explorer Sport Trac
  • P7B21 Ford F-150
  • P7B21 Ford F-250
  • P7B21 Ford F-350
  • P7B21 Ford Fiesta
  • P7B21 Ford Flex
  • P7B21 Ford Focus
  • P7B21 Ford Focus Electric
  • P7B21 Ford Freestar
  • P7B21 Ford Freestyle
  • P7B21 Ford Fusion
  • P7B21 Ford Fusion Energi
  • P7B21 Ford Fusion Hybrid
  • P7B21 Ford Fusion Plug-In Hybrid
  • P7B21 Ford GT
  • P7B21 Ford Mustang
  • P7B21 Ford Mustang Mach-E
  • P7B21 Ford Mystique
  • P7B21 Ford Probe
  • P7B21 Ford Ranger
  • P7B21 Ford Taurus
  • P7B21 Ford Taurus X
  • P7B21 Ford Tempo
  • P7B21 Ford Thunderbird
  • P7B21 Ford Transit
  • P7B21 Ford Transit Connect
  • P7B21 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.