Transmission not shift into third gear or reverse, after warming up?

The first thing to do is check the fuses, transmission fluid level and run the codes.

Here are guides to help us:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

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

It sounds like the fluid pressure control solenoid # 377 is not working, I have included its location in the diagrams as well. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.