Saturn Repair Problems? Ask a Mechanic for Answers ASAP
If the code was only in history and not in the current file, I would assume that the problem is intermitten. If you are not experiencing any problems at this time I would not be concerned. If the problem returns have it checked and see if the code has returned. This newer cars can see the smallest glitch once and never return. So I would just wait and see if the problem re occurs.
I am sorry to here that, it is good you have a reliable mechanic you can trust.