P991D

P991D Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P991D Diagnosis

The output circuits that are powered by VBAT2 will all be inoperative. Other fault codes may be present, but troubleshoot for this first. 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 OFF.

The top-of-clutch switch and bottom-of-clutch switch are both measured as closed at the same time. Troubleshoot for clutch switch shorted, or for a wiring fault between the clutch switch and the BHM.

Ford P991D Fault Code Meaning :

Ford P991D Symptoms :

Ford P991D Reasons :

How To Fix Ford P991D Trouble Code ?

Which Ford cars have the code P991D?

  • P991D Ford Aerostar
  • P991D Ford Bronco
  • P991D Ford C-Max
  • P991D Ford C-Max Energi
  • P991D Ford C-Max Hybrid
  • P991D Ford Contour
  • P991D Ford Crown Victoria
  • P991D Ford EcoSport
  • P991D Ford Econoline
  • P991D Ford Edge
  • P991D Ford Escape
  • P991D Ford Escape Hybrid
  • P991D Ford Escort
  • P991D Ford Everest
  • P991D Ford Excursion
  • P991D Ford Expedition
  • P991D Ford Explorer
  • P991D Ford Explorer Sport Trac
  • P991D Ford F-150
  • P991D Ford F-250
  • P991D Ford F-350
  • P991D Ford Fiesta
  • P991D Ford Flex
  • P991D Ford Focus
  • P991D Ford Focus Electric
  • P991D Ford Freestar
  • P991D Ford Freestyle
  • P991D Ford Fusion
  • P991D Ford Fusion Energi
  • P991D Ford Fusion Hybrid
  • P991D Ford Fusion Plug-In Hybrid
  • P991D Ford GT
  • P991D Ford Mustang
  • P991D Ford Mustang Mach-E
  • P991D Ford Mystique
  • P991D Ford Probe
  • P991D Ford Ranger
  • P991D Ford Taurus
  • P991D Ford Taurus X
  • P991D Ford Tempo
  • P991D Ford Thunderbird
  • P991D Ford Transit
  • P991D Ford Transit Connect
  • P991D 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.