Inspection doesn't pass on my 98 audi a4 quattro because its not reading the obd? What could it be?

Could it be a wire or the computer? The only light thats on is the airbag light on, but i dont think that has anything to do with it.Inspection doesn't pass on my 98 audi a4 quattro because its not reading the obd? What could it be?Could be bad wiring a lose connector. Sounds like it may be a tough one to find. Your best bet is to call a couple of Audi shops in your area and see if they have ever had this problem. It may take a couple of hours to find the problem so be prepared to pay for that time.