My 99 Integra ls OBD2 read's ERROR or NO COMUNICATION when I hook up the scanner. I have tried the scanners at my school, Advanced, and a friend's and they all read the same. Where should I start looking for a loose connection or what is the best way to find out whats going on. The car did read once before when an o2 sensor was bad, ever since then it wont? Any advise will be greatly appriciated. Thanks.