Some of the earlier cars will reset the monitors everytime you shut the car off so it can be a major pain in the rear to get one through smog. You can try doing a couple of drive cycles in it to get it to reset the monitors but if you have already driven it a couple of hundred miles and they have not reset I would say that the odds are against it, but still give it a try anyhow as you have nothing to loose. You have to have all but two of the monitors up currently. So regardless of how many your particular car has you need to have all but two of them up to pass that part of the test, at least here in So. Cal that is the way it is. If your monitors will not set then you need to take it for a long drive and then bring it in for a smog and do not shut the vehicle off until it is performed. I had one of these last week and that was exactly what was needed.

Mark