P1921

P1921 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P1921 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 ICU reads the wiper switch position and sends the status of the switch to the BHM. This fault becomes active when the ICU reads that both LO speed and HI speed are active at the same time.

Troubleshoot for a wiring short to ground fault on any of the CHM output or BHM output circuits discussed above. 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.

Ford P1921 Fault Code Meaning :

Ford P1921 Symptoms :

Ford P1921 Reasons :

How To Fix Ford P1921 Trouble Code ?

Which Ford cars have the code P1921?

  • P1921 Ford Aerostar
  • P1921 Ford Bronco
  • P1921 Ford C-Max
  • P1921 Ford C-Max Energi
  • P1921 Ford C-Max Hybrid
  • P1921 Ford Contour
  • P1921 Ford Crown Victoria
  • P1921 Ford EcoSport
  • P1921 Ford Econoline
  • P1921 Ford Edge
  • P1921 Ford Escape
  • P1921 Ford Escape Hybrid
  • P1921 Ford Escort
  • P1921 Ford Everest
  • P1921 Ford Excursion
  • P1921 Ford Expedition
  • P1921 Ford Explorer
  • P1921 Ford Explorer Sport Trac
  • P1921 Ford F-150
  • P1921 Ford F-250
  • P1921 Ford F-350
  • P1921 Ford Fiesta
  • P1921 Ford Flex
  • P1921 Ford Focus
  • P1921 Ford Focus Electric
  • P1921 Ford Freestar
  • P1921 Ford Freestyle
  • P1921 Ford Fusion
  • P1921 Ford Fusion Energi
  • P1921 Ford Fusion Hybrid
  • P1921 Ford Fusion Plug-In Hybrid
  • P1921 Ford GT
  • P1921 Ford Mustang
  • P1921 Ford Mustang Mach-E
  • P1921 Ford Mystique
  • P1921 Ford Probe
  • P1921 Ford Ranger
  • P1921 Ford Taurus
  • P1921 Ford Taurus X
  • P1921 Ford Tempo
  • P1921 Ford Thunderbird
  • P1921 Ford Transit
  • P1921 Ford Transit Connect
  • P1921 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.