failed emissions test, car computer system not responding

I love my Malibu, it has it's problems true enough, but this one is getting under my skin. I had taken my Malibu in for its annual emissions testing and it failed because they could not get a reading from the computer. That was embarrassing, and I had to go to the DMV and purchase a 4 month registration extension that costed me $32.00. I suspect that I will be paying a mechanic to fix the issue. Bad times in Aurora. ....