P637A

P637A Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P637A Diagnosis

The fault remains active until the ignition is turned ON when the fault is no longer present. Some BHM configurations force this circuit off until the ignition switch is cycled.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 P637A Fault Code Meaning :

Ford P637A Symptoms :

Ford P637A Reasons :

How To Fix Ford P637A Trouble Code ?

Which Ford cars have the code P637A?

  • P637A Ford Aerostar
  • P637A Ford Bronco
  • P637A Ford C-Max
  • P637A Ford C-Max Energi
  • P637A Ford C-Max Hybrid
  • P637A Ford Contour
  • P637A Ford Crown Victoria
  • P637A Ford EcoSport
  • P637A Ford Econoline
  • P637A Ford Edge
  • P637A Ford Escape
  • P637A Ford Escape Hybrid
  • P637A Ford Escort
  • P637A Ford Everest
  • P637A Ford Excursion
  • P637A Ford Expedition
  • P637A Ford Explorer
  • P637A Ford Explorer Sport Trac
  • P637A Ford F-150
  • P637A Ford F-250
  • P637A Ford F-350
  • P637A Ford Fiesta
  • P637A Ford Flex
  • P637A Ford Focus
  • P637A Ford Focus Electric
  • P637A Ford Freestar
  • P637A Ford Freestyle
  • P637A Ford Fusion
  • P637A Ford Fusion Energi
  • P637A Ford Fusion Hybrid
  • P637A Ford Fusion Plug-In Hybrid
  • P637A Ford GT
  • P637A Ford Mustang
  • P637A Ford Mustang Mach-E
  • P637A Ford Mystique
  • P637A Ford Probe
  • P637A Ford Ranger
  • P637A Ford Taurus
  • P637A Ford Taurus X
  • P637A Ford Tempo
  • P637A Ford Thunderbird
  • P637A Ford Transit
  • P637A Ford Transit Connect
  • P637A 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.