Check Engine Light on a 1996 BMW Z3 - PART 1 - Diagnosis

My Check Engine light just came on on my 1996 BMW Z3. NOW WHAT. So I first need to find out what is going on. so I do a search on "check engine light on a 1996 BMW". One of the first results I looked at said the guy bought a Peake R5/FCX-3 and scanned the engine and found 07,6C,1B,0A codes. 6B is "battery disconnected" and 0A is "PreCAT O2 sensor". I haven't run a code check on mine but I am not sure I want to buy the $149.99 tool to do the check, it is affordable but I think I can do it by going to Advanced Auto or AutoZone and having them run the check. The article I am referencing is here and I think it may be what I need to find what is wrong. The next search was "1996 BMW Z3 Check Engine Light" and the results gave me this link. This search came up with one good hit and it was about codes P1174 and P1175. The link to what should be or could be wrong is here. Most information all said go to Advanced Auto and have the codes read. SO that is what I will do and I will post an update when I get them.