P491D

P491D Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P491D 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 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 FF.

The End of Frame air output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for an End of Frame air solenoid fault, and for an air pressure switch short circuit fault.

Ford P491D Fault Code Meaning :

Ford P491D Symptoms :

Ford P491D Reasons :

How To Fix Ford P491D Trouble Code ?

Which Ford cars have the code P491D?

  • P491D Ford Aerostar
  • P491D Ford Bronco
  • P491D Ford C-Max
  • P491D Ford C-Max Energi
  • P491D Ford C-Max Hybrid
  • P491D Ford Contour
  • P491D Ford Crown Victoria
  • P491D Ford EcoSport
  • P491D Ford Econoline
  • P491D Ford Edge
  • P491D Ford Escape
  • P491D Ford Escape Hybrid
  • P491D Ford Escort
  • P491D Ford Everest
  • P491D Ford Excursion
  • P491D Ford Expedition
  • P491D Ford Explorer
  • P491D Ford Explorer Sport Trac
  • P491D Ford F-150
  • P491D Ford F-250
  • P491D Ford F-350
  • P491D Ford Fiesta
  • P491D Ford Flex
  • P491D Ford Focus
  • P491D Ford Focus Electric
  • P491D Ford Freestar
  • P491D Ford Freestyle
  • P491D Ford Fusion
  • P491D Ford Fusion Energi
  • P491D Ford Fusion Hybrid
  • P491D Ford Fusion Plug-In Hybrid
  • P491D Ford GT
  • P491D Ford Mustang
  • P491D Ford Mustang Mach-E
  • P491D Ford Mystique
  • P491D Ford Probe
  • P491D Ford Ranger
  • P491D Ford Taurus
  • P491D Ford Taurus X
  • P491D Ford Tempo
  • P491D Ford Thunderbird
  • P491D Ford Transit
  • P491D Ford Transit Connect
  • P491D 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.