Question

I have a 2005 Volkswagen Jetta 2.5L the car turns but won't start and I got the code P0864

Answer 1

P0864 Communication to transmission control module

Inside the TCM (transmission control module) is also the anti theft, go through the disarm process, P0864 should not be the reason the vehicle wont start, You have other reason for a no start, is there other code that came with this?

Answer 2

P0864 Volkswagen Code - TCM Communication Circuit Range/Performance
Read more: https://www.autocodes.com/p0864_volkswagen.html