P5B21

P5B21 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P5B21 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 position information for the switch becomes Not Available. Remove the duplicate Smart Switch, then use ServiceLink to verify that the correct Smart Switches are configured for the vehicle.

A comparison of pressures from all sensors is made. The smallest difference between the three is determined and a reference pressure is calculated. The Barometric pressure sensor value is compared to the reference value and if the difference is above the threshold a DTC is reported.

Ford P5B21 Fault Code Meaning :

Ford P5B21 Symptoms :

Ford P5B21 Reasons :

How To Fix Ford P5B21 Trouble Code ?

Which Ford cars have the code P5B21?

  • P5B21 Ford Aerostar
  • P5B21 Ford Bronco
  • P5B21 Ford C-Max
  • P5B21 Ford C-Max Energi
  • P5B21 Ford C-Max Hybrid
  • P5B21 Ford Contour
  • P5B21 Ford Crown Victoria
  • P5B21 Ford EcoSport
  • P5B21 Ford Econoline
  • P5B21 Ford Edge
  • P5B21 Ford Escape
  • P5B21 Ford Escape Hybrid
  • P5B21 Ford Escort
  • P5B21 Ford Everest
  • P5B21 Ford Excursion
  • P5B21 Ford Expedition
  • P5B21 Ford Explorer
  • P5B21 Ford Explorer Sport Trac
  • P5B21 Ford F-150
  • P5B21 Ford F-250
  • P5B21 Ford F-350
  • P5B21 Ford Fiesta
  • P5B21 Ford Flex
  • P5B21 Ford Focus
  • P5B21 Ford Focus Electric
  • P5B21 Ford Freestar
  • P5B21 Ford Freestyle
  • P5B21 Ford Fusion
  • P5B21 Ford Fusion Energi
  • P5B21 Ford Fusion Hybrid
  • P5B21 Ford Fusion Plug-In Hybrid
  • P5B21 Ford GT
  • P5B21 Ford Mustang
  • P5B21 Ford Mustang Mach-E
  • P5B21 Ford Mystique
  • P5B21 Ford Probe
  • P5B21 Ford Ranger
  • P5B21 Ford Taurus
  • P5B21 Ford Taurus X
  • P5B21 Ford Tempo
  • P5B21 Ford Thunderbird
  • P5B21 Ford Transit
  • P5B21 Ford Transit Connect
  • P5B21 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.