I am trying to get an emissions done on my 99 Saab 2.3t, and I have done a drive cycle, about 250 miles worth, and there is still no communication with the computer. The car drives great, except for the P0300. I am still trying to resolve that issue. Anybody have any idea why the computer is not communicating through the DTC port, but the car runs great? It was working a few weeks ago, not nothing.