Generic OBD II can show very basic sensors\outputs such as TPS position, RPM, speed, and O2 voltage. For almost all vehicles the only thing that can view more advanced things such as injector pulse width, cam\crank raw output, ABS wheel speed sensor waveforms, and EGR position is the dealer scan tool. Tools such as MODIS can also do most of these things on most cars but it is NOT guaranteed. Both the dealer tools and MODIS are very expensive. Toyota guys are lucky with an inexpensive Techstream, Honda guys can get by with HDS, and VW\Audi guys have VAGCOM. Every other platform is SOL. For example older GMs require the Tech2 and newer ones use the GM MVCI. Both are > $1500 on ebay. I've gotten by with an LED test light for most things but a scope would help.