P4A77

P4A77 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P4A77 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.Determine if the extra switch is not required for the vehicle or if the switch has been installed but the necessary reference parameter has not been programmed into the BHM.

The BHM measures the current on this circuit when the starter output is commanded ON. This fault indicates the magnetic switch or the wiring between the BHM and the magnetic switch is open circuit.

Ford P4A77 Fault Code Meaning :

Ford P4A77 Symptoms :

Ford P4A77 Reasons :

How To Fix Ford P4A77 Trouble Code ?

Which Ford cars have the code P4A77?

  • P4A77 Ford Aerostar
  • P4A77 Ford Bronco
  • P4A77 Ford C-Max
  • P4A77 Ford C-Max Energi
  • P4A77 Ford C-Max Hybrid
  • P4A77 Ford Contour
  • P4A77 Ford Crown Victoria
  • P4A77 Ford EcoSport
  • P4A77 Ford Econoline
  • P4A77 Ford Edge
  • P4A77 Ford Escape
  • P4A77 Ford Escape Hybrid
  • P4A77 Ford Escort
  • P4A77 Ford Everest
  • P4A77 Ford Excursion
  • P4A77 Ford Expedition
  • P4A77 Ford Explorer
  • P4A77 Ford Explorer Sport Trac
  • P4A77 Ford F-150
  • P4A77 Ford F-250
  • P4A77 Ford F-350
  • P4A77 Ford Fiesta
  • P4A77 Ford Flex
  • P4A77 Ford Focus
  • P4A77 Ford Focus Electric
  • P4A77 Ford Freestar
  • P4A77 Ford Freestyle
  • P4A77 Ford Fusion
  • P4A77 Ford Fusion Energi
  • P4A77 Ford Fusion Hybrid
  • P4A77 Ford Fusion Plug-In Hybrid
  • P4A77 Ford GT
  • P4A77 Ford Mustang
  • P4A77 Ford Mustang Mach-E
  • P4A77 Ford Mystique
  • P4A77 Ford Probe
  • P4A77 Ford Ranger
  • P4A77 Ford Taurus
  • P4A77 Ford Taurus X
  • P4A77 Ford Tempo
  • P4A77 Ford Thunderbird
  • P4A77 Ford Transit
  • P4A77 Ford Transit Connect
  • P4A77 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.