P91C4

P91C4 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P91C4 Diagnosis

The axle lift 2 output circuit is commanded OFF, but air pressure is detected at the pressure feedback switch. Troubleshoot for axle lift 2 air solenoid fault, and for air pressure switch short circuit fault.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 BHM drives the 5 cab overhead clearance and ID lamps from connector B5 pin C on circuit 46. All other marker and tail lamps are driven from BHM connector B1,K on circuit 23. This circuit connects to the CHM as an input at connector J3,P.

Ford P91C4 Fault Code Meaning :

Ford P91C4 Symptoms :

Ford P91C4 Reasons :

How To Fix Ford P91C4 Trouble Code ?

Which Ford cars have the code P91C4?

  • P91C4 Ford Aerostar
  • P91C4 Ford Bronco
  • P91C4 Ford C-Max
  • P91C4 Ford C-Max Energi
  • P91C4 Ford C-Max Hybrid
  • P91C4 Ford Contour
  • P91C4 Ford Crown Victoria
  • P91C4 Ford EcoSport
  • P91C4 Ford Econoline
  • P91C4 Ford Edge
  • P91C4 Ford Escape
  • P91C4 Ford Escape Hybrid
  • P91C4 Ford Escort
  • P91C4 Ford Everest
  • P91C4 Ford Excursion
  • P91C4 Ford Expedition
  • P91C4 Ford Explorer
  • P91C4 Ford Explorer Sport Trac
  • P91C4 Ford F-150
  • P91C4 Ford F-250
  • P91C4 Ford F-350
  • P91C4 Ford Fiesta
  • P91C4 Ford Flex
  • P91C4 Ford Focus
  • P91C4 Ford Focus Electric
  • P91C4 Ford Freestar
  • P91C4 Ford Freestyle
  • P91C4 Ford Fusion
  • P91C4 Ford Fusion Energi
  • P91C4 Ford Fusion Hybrid
  • P91C4 Ford Fusion Plug-In Hybrid
  • P91C4 Ford GT
  • P91C4 Ford Mustang
  • P91C4 Ford Mustang Mach-E
  • P91C4 Ford Mystique
  • P91C4 Ford Probe
  • P91C4 Ford Ranger
  • P91C4 Ford Taurus
  • P91C4 Ford Taurus X
  • P91C4 Ford Tempo
  • P91C4 Ford Thunderbird
  • P91C4 Ford Transit
  • P91C4 Ford Transit Connect
  • P91C4 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.