X15 code 3382: EGR data valid but below normal

[John Deere Boy]

Hi, in late December I had the local diesel shop diagnose code 5383, they ran an air handling test which it passed. Then they baked the DPF. It ran for a couple days and then set this current code 3382: EGR data valid but below normal. So far we have:

-replaced EGR differential pressure sensor, EGR temp sensor, IMAP, and intake temp sensors.
-removed and inspected EGR cooler. It looks pretty good, no appreciable soot accumulation
-removed and inspected EGR crossover tube. It also looks pretty clean.
-blew shop air through the exhaust gas pressure sensor tube, seems open.

Right now the truck actively regenerates every 8hrs or so. Occasionally gives me the 3hr derate warning which may or may not be active the next day. I have insite 7.62 so I can't run the air handling test. This truck has a DPF soot level gauge which has ALWAYS read 0, even right before a successful active regen. The logs linked below also show 0% soot load at all times, 0% commanded EGR valve position, 0% measured EGR valve position, and 0 EGR differential pressure.

Link to three .csv logs https://drive.google.com/drive/folders/1...sp=sharing
2019 T680, 480k mi, 13k hrs. I've had it two years. Farm truck. Average trip is 45 miles to the elevator, idle, 45 miles back home. I usually activate parked regen if it's still regenerating when i get home.
Thanks!