P21D4

P21D4 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P21D4 Diagnosis

The PTO 1 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for PTO 2 air solenoid fault, and for air pressure switch short circuit fault.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 OFF.

The top-of-clutch switch and bottom-of-clutch switch are both measured as closed at the same time. Troubleshoot for clutch switch shorted, or for a wiring fault between the clutch switch and the BHM.

Ford P21D4 Fault Code Meaning :

Ford P21D4 Symptoms :

Ford P21D4 Reasons :

How To Fix Ford P21D4 Trouble Code ?

Which Ford cars have the code P21D4?

  • P21D4 Ford Aerostar
  • P21D4 Ford Bronco
  • P21D4 Ford C-Max
  • P21D4 Ford C-Max Energi
  • P21D4 Ford C-Max Hybrid
  • P21D4 Ford Contour
  • P21D4 Ford Crown Victoria
  • P21D4 Ford EcoSport
  • P21D4 Ford Econoline
  • P21D4 Ford Edge
  • P21D4 Ford Escape
  • P21D4 Ford Escape Hybrid
  • P21D4 Ford Escort
  • P21D4 Ford Everest
  • P21D4 Ford Excursion
  • P21D4 Ford Expedition
  • P21D4 Ford Explorer
  • P21D4 Ford Explorer Sport Trac
  • P21D4 Ford F-150
  • P21D4 Ford F-250
  • P21D4 Ford F-350
  • P21D4 Ford Fiesta
  • P21D4 Ford Flex
  • P21D4 Ford Focus
  • P21D4 Ford Focus Electric
  • P21D4 Ford Freestar
  • P21D4 Ford Freestyle
  • P21D4 Ford Fusion
  • P21D4 Ford Fusion Energi
  • P21D4 Ford Fusion Hybrid
  • P21D4 Ford Fusion Plug-In Hybrid
  • P21D4 Ford GT
  • P21D4 Ford Mustang
  • P21D4 Ford Mustang Mach-E
  • P21D4 Ford Mystique
  • P21D4 Ford Probe
  • P21D4 Ford Ranger
  • P21D4 Ford Taurus
  • P21D4 Ford Taurus X
  • P21D4 Ford Tempo
  • P21D4 Ford Thunderbird
  • P21D4 Ford Transit
  • P21D4 Ford Transit Connect
  • P21D4 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.