Fault codes P0378, P0778, C3F87, U3111, U0C00, B0357, U3118, U1787 & U1000?

Some of these codes are communication codes and that is most likely a scan tool issue.

However, as for the issue of restarting the engine, we need to start with the fluid.

Is the fluid full and in good condition?

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

If it is then we need to move on to a possible electrical issue, but this does sound like we have an internal issue with transmission.

So that means we should also drop the pan and look for metal in the unit because if that is there then none of this other issues matter because we are going to have to tear it down.

I am attaching info from the manual that will help with this.

Please let me know what questions you have, and we can go from there.

Thanks