P77A3

P77A3 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P77A3 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 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 P77A3 Fault Code Meaning :

Ford P77A3 Symptoms :

Ford P77A3 Reasons :

How To Fix Ford P77A3 Trouble Code ?

Which Ford cars have the code P77A3?

  • P77A3 Ford Aerostar
  • P77A3 Ford Bronco
  • P77A3 Ford C-Max
  • P77A3 Ford C-Max Energi
  • P77A3 Ford C-Max Hybrid
  • P77A3 Ford Contour
  • P77A3 Ford Crown Victoria
  • P77A3 Ford EcoSport
  • P77A3 Ford Econoline
  • P77A3 Ford Edge
  • P77A3 Ford Escape
  • P77A3 Ford Escape Hybrid
  • P77A3 Ford Escort
  • P77A3 Ford Everest
  • P77A3 Ford Excursion
  • P77A3 Ford Expedition
  • P77A3 Ford Explorer
  • P77A3 Ford Explorer Sport Trac
  • P77A3 Ford F-150
  • P77A3 Ford F-250
  • P77A3 Ford F-350
  • P77A3 Ford Fiesta
  • P77A3 Ford Flex
  • P77A3 Ford Focus
  • P77A3 Ford Focus Electric
  • P77A3 Ford Freestar
  • P77A3 Ford Freestyle
  • P77A3 Ford Fusion
  • P77A3 Ford Fusion Energi
  • P77A3 Ford Fusion Hybrid
  • P77A3 Ford Fusion Plug-In Hybrid
  • P77A3 Ford GT
  • P77A3 Ford Mustang
  • P77A3 Ford Mustang Mach-E
  • P77A3 Ford Mystique
  • P77A3 Ford Probe
  • P77A3 Ford Ranger
  • P77A3 Ford Taurus
  • P77A3 Ford Taurus X
  • P77A3 Ford Tempo
  • P77A3 Ford Thunderbird
  • P77A3 Ford Transit
  • P77A3 Ford Transit Connect
  • P77A3 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.