Crawl back under and unplug the harness from the pilot bushing/connector on the front right of the transmission. If fluid comes out after it, then pull the TCM (E-TCU) and inspect it for signs of fluid incursion.

If so, use electrical contact cleaner spray and clean the TCM and socket, then change the pilot bushing.

Then take it to a properly-equipped shop that has the proper interface to talk to the TCM and clear the codes.

For whatever reason, fluid changes can sometimes trigger the pilot bushing to leak. When it does, it can flood the TCM, trigger P07xx codes and leave you in limp mode.

And you are presently in limp mode, so out makes sense to check out the pilot bushing.

Good luck.