C0491

C0491 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

C0491 Diagnosis

The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for an open circuit fault.The BHM supplies battery power on this circuit when the key is in the RUN or CRANK positions. Troubleshoot for a wiring fault shorting this circuit to ground or for too many optional circuits spliced into it that is causing the BHM to turn it off.

When the engine is in higher engine speed and torque condition, the differential pressure over the DPF is expected to rise according to engine speed and torque. If the differential pressure exceeds a threshold then the differential pressure sensor plausibility DTC is set.

Ford C0491 Fault Code Meaning :

Ford C0491 Symptoms :

Ford C0491 Reasons :

How To Fix Ford C0491 Trouble Code ?

Which Ford cars have the code C0491?

  • C0491 Ford Aerostar
  • C0491 Ford Bronco
  • C0491 Ford C-Max
  • C0491 Ford C-Max Energi
  • C0491 Ford C-Max Hybrid
  • C0491 Ford Contour
  • C0491 Ford Crown Victoria
  • C0491 Ford EcoSport
  • C0491 Ford Econoline
  • C0491 Ford Edge
  • C0491 Ford Escape
  • C0491 Ford Escape Hybrid
  • C0491 Ford Escort
  • C0491 Ford Everest
  • C0491 Ford Excursion
  • C0491 Ford Expedition
  • C0491 Ford Explorer
  • C0491 Ford Explorer Sport Trac
  • C0491 Ford F-150
  • C0491 Ford F-250
  • C0491 Ford F-350
  • C0491 Ford Fiesta
  • C0491 Ford Flex
  • C0491 Ford Focus
  • C0491 Ford Focus Electric
  • C0491 Ford Freestar
  • C0491 Ford Freestyle
  • C0491 Ford Fusion
  • C0491 Ford Fusion Energi
  • C0491 Ford Fusion Hybrid
  • C0491 Ford Fusion Plug-In Hybrid
  • C0491 Ford GT
  • C0491 Ford Mustang
  • C0491 Ford Mustang Mach-E
  • C0491 Ford Mystique
  • C0491 Ford Probe
  • C0491 Ford Ranger
  • C0491 Ford Taurus
  • C0491 Ford Taurus X
  • C0491 Ford Tempo
  • C0491 Ford Thunderbird
  • C0491 Ford Transit
  • C0491 Ford Transit Connect
  • C0491 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.