Well I had a CEL recently which was likely the O2 sensor (just unplugged the battery, hasn't come back since) but when I went to autozone and advance they couldnt get any data from my car. I had the reflash about a month ago after my S/C and I can't quite get back to that dealership, since I've moved out of state, to see if they could fix this. I'm just wondering what might be a cause of this or what I might do before I either head back to a dealership(and pay big$) or start digging into it myself. I suppose I could wait until my next trip back towards the dealership that did it for me, but if my CEL light comes on again I'd really love to know what it's indicating. Any thoughts are welcome, thanks!

Sam
2001 Z24 Auto

Um, definitely the fuse. I was checking the fuse for the cigarette lighter since it stopped working for me and wouldn't you know it, it shares a fuse with my data port!