P7A21

P7A21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P7A21 Diagnosis

This fault indicates that the circuit is drawing more current than it is designed to supply, and possibly there is a wiring fault shorting this circuit to ground. The fault remains active until the ignition is turned ON when the fault is no longer present.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 P7A21 Fault Code Meaning :

Ford P7A21 Symptoms :

Ford P7A21 Reasons :

How To Fix Ford P7A21 Trouble Code ?

Which Ford cars have the code P7A21?

  • P7A21 Ford Aerostar
  • P7A21 Ford Bronco
  • P7A21 Ford C-Max
  • P7A21 Ford C-Max Energi
  • P7A21 Ford C-Max Hybrid
  • P7A21 Ford Contour
  • P7A21 Ford Crown Victoria
  • P7A21 Ford EcoSport
  • P7A21 Ford Econoline
  • P7A21 Ford Edge
  • P7A21 Ford Escape
  • P7A21 Ford Escape Hybrid
  • P7A21 Ford Escort
  • P7A21 Ford Everest
  • P7A21 Ford Excursion
  • P7A21 Ford Expedition
  • P7A21 Ford Explorer
  • P7A21 Ford Explorer Sport Trac
  • P7A21 Ford F-150
  • P7A21 Ford F-250
  • P7A21 Ford F-350
  • P7A21 Ford Fiesta
  • P7A21 Ford Flex
  • P7A21 Ford Focus
  • P7A21 Ford Focus Electric
  • P7A21 Ford Freestar
  • P7A21 Ford Freestyle
  • P7A21 Ford Fusion
  • P7A21 Ford Fusion Energi
  • P7A21 Ford Fusion Hybrid
  • P7A21 Ford Fusion Plug-In Hybrid
  • P7A21 Ford GT
  • P7A21 Ford Mustang
  • P7A21 Ford Mustang Mach-E
  • P7A21 Ford Mystique
  • P7A21 Ford Probe
  • P7A21 Ford Ranger
  • P7A21 Ford Taurus
  • P7A21 Ford Taurus X
  • P7A21 Ford Tempo
  • P7A21 Ford Thunderbird
  • P7A21 Ford Transit
  • P7A21 Ford Transit Connect
  • P7A21 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.