PLEEEZE HELP! My engine light came on after I topped off at the gas station...oops...I got distracted with the kiddos. So it used to do it before and would come off, except this time it hasn't come off. I took it to Auto Zone where they have this "CHECK ENGINE LIGHT ON" device. It said there was some kinda of memory fault or something? Any ideas. Thanks a bunch! I'm new to this so pleeeze be kind!

PS I have a 2001 Stratus ES with about 70K miles, if that helps any?