B21A1

B21A1 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

B21A1 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 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 B21A1 Fault Code Meaning :

Ford B21A1 Symptoms :

Ford B21A1 Reasons :

How To Fix Ford B21A1 Trouble Code ?

Which Ford cars have the code B21A1?

  • B21A1 Ford Aerostar
  • B21A1 Ford Bronco
  • B21A1 Ford C-Max
  • B21A1 Ford C-Max Energi
  • B21A1 Ford C-Max Hybrid
  • B21A1 Ford Contour
  • B21A1 Ford Crown Victoria
  • B21A1 Ford EcoSport
  • B21A1 Ford Econoline
  • B21A1 Ford Edge
  • B21A1 Ford Escape
  • B21A1 Ford Escape Hybrid
  • B21A1 Ford Escort
  • B21A1 Ford Everest
  • B21A1 Ford Excursion
  • B21A1 Ford Expedition
  • B21A1 Ford Explorer
  • B21A1 Ford Explorer Sport Trac
  • B21A1 Ford F-150
  • B21A1 Ford F-250
  • B21A1 Ford F-350
  • B21A1 Ford Fiesta
  • B21A1 Ford Flex
  • B21A1 Ford Focus
  • B21A1 Ford Focus Electric
  • B21A1 Ford Freestar
  • B21A1 Ford Freestyle
  • B21A1 Ford Fusion
  • B21A1 Ford Fusion Energi
  • B21A1 Ford Fusion Hybrid
  • B21A1 Ford Fusion Plug-In Hybrid
  • B21A1 Ford GT
  • B21A1 Ford Mustang
  • B21A1 Ford Mustang Mach-E
  • B21A1 Ford Mystique
  • B21A1 Ford Probe
  • B21A1 Ford Ranger
  • B21A1 Ford Taurus
  • B21A1 Ford Taurus X
  • B21A1 Ford Tempo
  • B21A1 Ford Thunderbird
  • B21A1 Ford Transit
  • B21A1 Ford Transit Connect
  • B21A1 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.