P1638

P1638 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.

P1638 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 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 OFF.

The disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.

Ford P1638 Fault Code Meaning :

Ford P1638 Symptoms :

Ford P1638 Reasons :

How To Fix Ford P1638 Trouble Code ?

Which Ford cars have the code P1638?

  • P1638 Ford Aerostar
  • P1638 Ford Bronco
  • P1638 Ford C-Max
  • P1638 Ford C-Max Energi
  • P1638 Ford C-Max Hybrid
  • P1638 Ford Contour
  • P1638 Ford Crown Victoria
  • P1638 Ford EcoSport
  • P1638 Ford Econoline
  • P1638 Ford Edge
  • P1638 Ford Escape
  • P1638 Ford Escape Hybrid
  • P1638 Ford Escort
  • P1638 Ford Everest
  • P1638 Ford Excursion
  • P1638 Ford Expedition
  • P1638 Ford Explorer
  • P1638 Ford Explorer Sport Trac
  • P1638 Ford F-150
  • P1638 Ford F-250
  • P1638 Ford F-350
  • P1638 Ford Fiesta
  • P1638 Ford Flex
  • P1638 Ford Focus
  • P1638 Ford Focus Electric
  • P1638 Ford Freestar
  • P1638 Ford Freestyle
  • P1638 Ford Fusion
  • P1638 Ford Fusion Energi
  • P1638 Ford Fusion Hybrid
  • P1638 Ford Fusion Plug-In Hybrid
  • P1638 Ford GT
  • P1638 Ford Mustang
  • P1638 Ford Mustang Mach-E
  • P1638 Ford Mystique
  • P1638 Ford Probe
  • P1638 Ford Ranger
  • P1638 Ford Taurus
  • P1638 Ford Taurus X
  • P1638 Ford Tempo
  • P1638 Ford Thunderbird
  • P1638 Ford Transit
  • P1638 Ford Transit Connect
  • P1638 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.