Code P0443?

2003 FORD F-150

125,000 MILES • 5.4L • V8 • 2WD • AUTOMATIC

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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.

Sep 10, 2022 at 5:37 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.

JACOBANDNICKOLAS

AUTOMOTIVE REPAIR CONTRIBUTOR
110,190 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 enlarge)

Sep 10, 2022 at 9:07 PM