Do the 2003s have problems with the transmission control modules the 1.8 l turbo

What is your question?

Half the time the car runs perfectly and half the time it won't shift or when I put it in drive it'll stay in first gear won't go any higher or when it does go through the gears it won't downshift when I stop it won't let me put it over and manual it still wants to shift for me but that's half the time that I'm driving it's not all the time I'm wondering if it's the control module for the transmission or maybe something as simple as transmission fluid because it's very hard to check and I cannot afford to take it to a dealership I just cannot do that

What makes this problem better or worse?

It acts up the computer screen fades when it's hot doesn't work

How long has your 2003 Volkswagen Passat had this problem?

About the car from a private individual about a month and a half ago I've always wanted one