U1991

U1991 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

U1991 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 U1991 Fault Code Meaning :

Ford U1991 Symptoms :

Ford U1991 Reasons :

How To Fix Ford U1991 Trouble Code ?

Which Ford cars have the code U1991?

  • U1991 Ford Aerostar
  • U1991 Ford Bronco
  • U1991 Ford C-Max
  • U1991 Ford C-Max Energi
  • U1991 Ford C-Max Hybrid
  • U1991 Ford Contour
  • U1991 Ford Crown Victoria
  • U1991 Ford EcoSport
  • U1991 Ford Econoline
  • U1991 Ford Edge
  • U1991 Ford Escape
  • U1991 Ford Escape Hybrid
  • U1991 Ford Escort
  • U1991 Ford Everest
  • U1991 Ford Excursion
  • U1991 Ford Expedition
  • U1991 Ford Explorer
  • U1991 Ford Explorer Sport Trac
  • U1991 Ford F-150
  • U1991 Ford F-250
  • U1991 Ford F-350
  • U1991 Ford Fiesta
  • U1991 Ford Flex
  • U1991 Ford Focus
  • U1991 Ford Focus Electric
  • U1991 Ford Freestar
  • U1991 Ford Freestyle
  • U1991 Ford Fusion
  • U1991 Ford Fusion Energi
  • U1991 Ford Fusion Hybrid
  • U1991 Ford Fusion Plug-In Hybrid
  • U1991 Ford GT
  • U1991 Ford Mustang
  • U1991 Ford Mustang Mach-E
  • U1991 Ford Mystique
  • U1991 Ford Probe
  • U1991 Ford Ranger
  • U1991 Ford Taurus
  • U1991 Ford Taurus X
  • U1991 Ford Tempo
  • U1991 Ford Thunderbird
  • U1991 Ford Transit
  • U1991 Ford Transit Connect
  • U1991 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.