used it on the POS today (my new O2 sensor came in, what a b!tch that was to do! and it came off easy!), it works awesome! I can read any sensor in REAL TIME! auto zone says bad o2 sensor? i can show you whats bad about it (if anything). Mine was proably only a bad wire (most were shot, i ended up repacing 3 feet of wire loom (4 wires, 3' each) to get it to work! I can log sensor data while driving, to find thoes pesky intermitant faults that only happen during that certine condition. I can't wait to have more stuff break (J/K)!