P21D1

P21D1 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P21D1 Diagnosis

The fault remains active until the ignition is turned ON when the fault is no longer present. Some BHM configurations force this circuit off until the ignition switch is cycled.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 P21D1 Fault Code Meaning :

Ford P21D1 Symptoms :

Ford P21D1 Reasons :

How To Fix Ford P21D1 Trouble Code ?

Which Ford cars have the code P21D1?

  • P21D1 Ford Aerostar
  • P21D1 Ford Bronco
  • P21D1 Ford C-Max
  • P21D1 Ford C-Max Energi
  • P21D1 Ford C-Max Hybrid
  • P21D1 Ford Contour
  • P21D1 Ford Crown Victoria
  • P21D1 Ford EcoSport
  • P21D1 Ford Econoline
  • P21D1 Ford Edge
  • P21D1 Ford Escape
  • P21D1 Ford Escape Hybrid
  • P21D1 Ford Escort
  • P21D1 Ford Everest
  • P21D1 Ford Excursion
  • P21D1 Ford Expedition
  • P21D1 Ford Explorer
  • P21D1 Ford Explorer Sport Trac
  • P21D1 Ford F-150
  • P21D1 Ford F-250
  • P21D1 Ford F-350
  • P21D1 Ford Fiesta
  • P21D1 Ford Flex
  • P21D1 Ford Focus
  • P21D1 Ford Focus Electric
  • P21D1 Ford Freestar
  • P21D1 Ford Freestyle
  • P21D1 Ford Fusion
  • P21D1 Ford Fusion Energi
  • P21D1 Ford Fusion Hybrid
  • P21D1 Ford Fusion Plug-In Hybrid
  • P21D1 Ford GT
  • P21D1 Ford Mustang
  • P21D1 Ford Mustang Mach-E
  • P21D1 Ford Mystique
  • P21D1 Ford Probe
  • P21D1 Ford Ranger
  • P21D1 Ford Taurus
  • P21D1 Ford Taurus X
  • P21D1 Ford Tempo
  • P21D1 Ford Thunderbird
  • P21D1 Ford Transit
  • P21D1 Ford Transit Connect
  • P21D1 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.