[beepbeep]

all OBD2 scanners are usually able to provide basic fuel/engine trouble codes and parameters. It is mandated by law.

But if you need fancier functions (reading manufacturer-specific gearbox codes etc.) you need to get specialized one.

I used VagCom för VAG vehicles and it worked well even for specific functions.
Now I have a GM-sourced vehicle, I use GDS2 together with VCX Nano. It is basically what dealers use and is able to fully support whole vehicle and all onboard computers.