I have no done anything to the tune since I got the car. I’ve been told I need the tune done so those codes can be accessed or whatever and I’ve also been told that an O2 extension might also work. The problem is I don’t know anyone in the state that does tunes and every shop I call has no idea where I should start. Clearly I don’t know a whole lot of information either but I’m just starting to learn basic stuff so pardon my stupidityIs the rear O2 turned off in the tune? I’m guessing you have a pro tune and not an AP correct?