P6B21

P6B21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P6B21 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 supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for a wiring fault shorting this circuit to ground or for too many optional circuits spliced into it that is causing the BHM to turn it off.

When the engine is in higher engine speed and torque condition, the differential pressure over the DPF is expected to rise according to engine speed and torque. If the differential pressure exceeds a threshold then the differential pressure sensor plausibility DTC is set.

Ford P6B21 Fault Code Meaning :

Ford P6B21 Symptoms :

Ford P6B21 Reasons :

How To Fix Ford P6B21 Trouble Code ?

Which Ford cars have the code P6B21?

  • P6B21 Ford Aerostar
  • P6B21 Ford Bronco
  • P6B21 Ford C-Max
  • P6B21 Ford C-Max Energi
  • P6B21 Ford C-Max Hybrid
  • P6B21 Ford Contour
  • P6B21 Ford Crown Victoria
  • P6B21 Ford EcoSport
  • P6B21 Ford Econoline
  • P6B21 Ford Edge
  • P6B21 Ford Escape
  • P6B21 Ford Escape Hybrid
  • P6B21 Ford Escort
  • P6B21 Ford Everest
  • P6B21 Ford Excursion
  • P6B21 Ford Expedition
  • P6B21 Ford Explorer
  • P6B21 Ford Explorer Sport Trac
  • P6B21 Ford F-150
  • P6B21 Ford F-250
  • P6B21 Ford F-350
  • P6B21 Ford Fiesta
  • P6B21 Ford Flex
  • P6B21 Ford Focus
  • P6B21 Ford Focus Electric
  • P6B21 Ford Freestar
  • P6B21 Ford Freestyle
  • P6B21 Ford Fusion
  • P6B21 Ford Fusion Energi
  • P6B21 Ford Fusion Hybrid
  • P6B21 Ford Fusion Plug-In Hybrid
  • P6B21 Ford GT
  • P6B21 Ford Mustang
  • P6B21 Ford Mustang Mach-E
  • P6B21 Ford Mystique
  • P6B21 Ford Probe
  • P6B21 Ford Ranger
  • P6B21 Ford Taurus
  • P6B21 Ford Taurus X
  • P6B21 Ford Tempo
  • P6B21 Ford Thunderbird
  • P6B21 Ford Transit
  • P6B21 Ford Transit Connect
  • P6B21 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.