Code P0443?

NTDBDAD62

MEMBER
2003 FORD F-150
5.4L
V8
2WD
AUTOMATIC
125,000 MILES

Replaced purge valve, service engine soon light comes back on. Had PCM serviced, still same problem. Need Wiring diagram to check for shorts, also vehicle has a hard time starting, but if you turn the key on and wait a minute or so, it will start. Already replaced fuel pump. The truck listed above is a Harley Davidson edition with the supercharger on it.

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,874 POSTS

Hi,

I attached the diagnostics below specific to the code. Pics 1 - 7 contain the directions. The remaining pics show the connector and wiring schematics for the powertrain control circuits. I highlighted the wiring for the purge valve. However, when I highlight the power wire, it covers other things as well, so take your time when going through them.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below. Note: The schematics started as only 4 pages. I had to cut each in half to make them readable for you. I did overlap them so you can follow from one to the next.

Images (Click to make bigger)