P1A21

P1A21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P1A21 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.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 P1A21 Fault Code Meaning :

Ford P1A21 Symptoms :

Ford P1A21 Reasons :

How To Fix Ford P1A21 Trouble Code ?

Which Ford cars have the code P1A21?

  • P1A21 Ford Aerostar
  • P1A21 Ford Bronco
  • P1A21 Ford C-Max
  • P1A21 Ford C-Max Energi
  • P1A21 Ford C-Max Hybrid
  • P1A21 Ford Contour
  • P1A21 Ford Crown Victoria
  • P1A21 Ford EcoSport
  • P1A21 Ford Econoline
  • P1A21 Ford Edge
  • P1A21 Ford Escape
  • P1A21 Ford Escape Hybrid
  • P1A21 Ford Escort
  • P1A21 Ford Everest
  • P1A21 Ford Excursion
  • P1A21 Ford Expedition
  • P1A21 Ford Explorer
  • P1A21 Ford Explorer Sport Trac
  • P1A21 Ford F-150
  • P1A21 Ford F-250
  • P1A21 Ford F-350
  • P1A21 Ford Fiesta
  • P1A21 Ford Flex
  • P1A21 Ford Focus
  • P1A21 Ford Focus Electric
  • P1A21 Ford Freestar
  • P1A21 Ford Freestyle
  • P1A21 Ford Fusion
  • P1A21 Ford Fusion Energi
  • P1A21 Ford Fusion Hybrid
  • P1A21 Ford Fusion Plug-In Hybrid
  • P1A21 Ford GT
  • P1A21 Ford Mustang
  • P1A21 Ford Mustang Mach-E
  • P1A21 Ford Mystique
  • P1A21 Ford Probe
  • P1A21 Ford Ranger
  • P1A21 Ford Taurus
  • P1A21 Ford Taurus X
  • P1A21 Ford Tempo
  • P1A21 Ford Thunderbird
  • P1A21 Ford Transit
  • P1A21 Ford Transit Connect
  • P1A21 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.