P40A9

P40A9 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P40A9 Diagnosis

The CHM does not suupport PWM type DRLs. The vehicle has a BHM mismatch with the CHM. Replace the CHM with one that is compatible with the BHM.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 P40A9 Fault Code Meaning :

Ford P40A9 Symptoms :

Ford P40A9 Reasons :

How To Fix Ford P40A9 Trouble Code ?

Which Ford cars have the code P40A9?

  • P40A9 Ford Aerostar
  • P40A9 Ford Bronco
  • P40A9 Ford C-Max
  • P40A9 Ford C-Max Energi
  • P40A9 Ford C-Max Hybrid
  • P40A9 Ford Contour
  • P40A9 Ford Crown Victoria
  • P40A9 Ford EcoSport
  • P40A9 Ford Econoline
  • P40A9 Ford Edge
  • P40A9 Ford Escape
  • P40A9 Ford Escape Hybrid
  • P40A9 Ford Escort
  • P40A9 Ford Everest
  • P40A9 Ford Excursion
  • P40A9 Ford Expedition
  • P40A9 Ford Explorer
  • P40A9 Ford Explorer Sport Trac
  • P40A9 Ford F-150
  • P40A9 Ford F-250
  • P40A9 Ford F-350
  • P40A9 Ford Fiesta
  • P40A9 Ford Flex
  • P40A9 Ford Focus
  • P40A9 Ford Focus Electric
  • P40A9 Ford Freestar
  • P40A9 Ford Freestyle
  • P40A9 Ford Fusion
  • P40A9 Ford Fusion Energi
  • P40A9 Ford Fusion Hybrid
  • P40A9 Ford Fusion Plug-In Hybrid
  • P40A9 Ford GT
  • P40A9 Ford Mustang
  • P40A9 Ford Mustang Mach-E
  • P40A9 Ford Mystique
  • P40A9 Ford Probe
  • P40A9 Ford Ranger
  • P40A9 Ford Taurus
  • P40A9 Ford Taurus X
  • P40A9 Ford Tempo
  • P40A9 Ford Thunderbird
  • P40A9 Ford Transit
  • P40A9 Ford Transit Connect
  • P40A9 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.