P638B
P638B Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.P638B 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.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.
This circuit connects to the CHM as an input at connector J3,P. The CHM passes the signal through to power the tail lamps and marker lamps from connector C2 pin G and also from connector C1 pins D, E, and F.
Ford P638B Fault Code Meaning :
Ford P638B Symptoms :
Ford P638B Reasons :
How To Fix Ford P638B Trouble Code ?
Which Ford cars have the code P638B?
- P638B Ford Aerostar
- P638B Ford Bronco
- P638B Ford C-Max
- P638B Ford C-Max Energi
- P638B Ford C-Max Hybrid
- P638B Ford Contour
- P638B Ford Crown Victoria
- P638B Ford EcoSport
- P638B Ford Econoline
- P638B Ford Edge
- P638B Ford Escape
- P638B Ford Escape Hybrid
- P638B Ford Escort
- P638B Ford Everest
- P638B Ford Excursion
- P638B Ford Expedition
- P638B Ford Explorer
- P638B Ford Explorer Sport Trac
- P638B Ford F-150
- P638B Ford F-250
- P638B Ford F-350
- P638B Ford Fiesta
- P638B Ford Flex
- P638B Ford Focus
- P638B Ford Focus Electric
- P638B Ford Freestar
- P638B Ford Freestyle
- P638B Ford Fusion
- P638B Ford Fusion Energi
- P638B Ford Fusion Hybrid
- P638B Ford Fusion Plug-In Hybrid
- P638B Ford GT
- P638B Ford Mustang
- P638B Ford Mustang Mach-E
- P638B Ford Mystique
- P638B Ford Probe
- P638B Ford Ranger
- P638B Ford Taurus
- P638B Ford Taurus X
- P638B Ford Tempo
- P638B Ford Thunderbird
- P638B Ford Transit
- P638B Ford Transit Connect
- P638B 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.