I hit that too. If I asked it about the O2 sensor, it was the O2 sensor. iirc I had to ask if what PIDs to monitor, give all of that to it at once, then try a few experiments it suggested. It also helped that it told me how to self-confirm by watching that the fuel trim doesn't go too high, which was also my cue to shut off the engine if it did.

At no point was I just going to commit to some irreversable decision it suggested without confirming it myself or elsewhere, like blindly replacing a part. At the same time, it really helped me because I'm too noob to even know what to Google (every term above was new to me).