What is an EGR position below closed limit mean?

Hello,

What exactly is the code number? And is this the 5.0Liter f-150? extra-cab or not? DId you get a code 335? I put up a list of EGR related codes.

I'm putting up the EGR position wiring diagrams so you can check the circuits.
So, the first diagram is the 5-volt Reference circuit, so it should test as 5 volts.
Second diagram is the Signal wire going back to the ECM.
third diagram is a shared Ground wire, shared with a few other sensors.
The fourth diagram is the ECM pins. You should have the same Signal Voltage at the ECM here on Pin #27 (brown/light green wire) as you have on the Signal wire at the EGR position Signal Wire.
Hopefully, this will help you find out what's going on with these circuits. I will add guides to help as well.

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

https://www.2carpros.com/articles/how-to-use-a-voltmeter