I am having some issues with a reduced engine performance warning. It only happens when I hit a big bump, going over railroad tracks in this case. When I went over the tracks or hit a big bump the warning will come up. The few times it has happened, the issue was fixed by restarting the car. Another note, my sister was using my car and ran it out of gas...it was sometime after this that I first started having the issue...is there a connection? O was thinking fuel filter issue.