P1B21

P1B21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P1B21 Diagnosis

The output circuits that are powered by VBAT3 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. The fuse in the main PDM powering this circuit may be open.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 P1B21 Fault Code Meaning :

Ford P1B21 Symptoms :

Ford P1B21 Reasons :

How To Fix Ford P1B21 Trouble Code ?

Which Ford cars have the code P1B21?

  • P1B21 Ford Aerostar
  • P1B21 Ford Bronco
  • P1B21 Ford C-Max
  • P1B21 Ford C-Max Energi
  • P1B21 Ford C-Max Hybrid
  • P1B21 Ford Contour
  • P1B21 Ford Crown Victoria
  • P1B21 Ford EcoSport
  • P1B21 Ford Econoline
  • P1B21 Ford Edge
  • P1B21 Ford Escape
  • P1B21 Ford Escape Hybrid
  • P1B21 Ford Escort
  • P1B21 Ford Everest
  • P1B21 Ford Excursion
  • P1B21 Ford Expedition
  • P1B21 Ford Explorer
  • P1B21 Ford Explorer Sport Trac
  • P1B21 Ford F-150
  • P1B21 Ford F-250
  • P1B21 Ford F-350
  • P1B21 Ford Fiesta
  • P1B21 Ford Flex
  • P1B21 Ford Focus
  • P1B21 Ford Focus Electric
  • P1B21 Ford Freestar
  • P1B21 Ford Freestyle
  • P1B21 Ford Fusion
  • P1B21 Ford Fusion Energi
  • P1B21 Ford Fusion Hybrid
  • P1B21 Ford Fusion Plug-In Hybrid
  • P1B21 Ford GT
  • P1B21 Ford Mustang
  • P1B21 Ford Mustang Mach-E
  • P1B21 Ford Mystique
  • P1B21 Ford Probe
  • P1B21 Ford Ranger
  • P1B21 Ford Taurus
  • P1B21 Ford Taurus X
  • P1B21 Ford Tempo
  • P1B21 Ford Thunderbird
  • P1B21 Ford Transit
  • P1B21 Ford Transit Connect
  • P1B21 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.