Has anyone had the problem with the check engine light coming on and staying on? Then goes off after a couple of days. I first had this problem at 1,500 miles. They tried to download some programs into computer, but, the computer wouldn't reset. Had to ship computer to California so the engineers could reset it. Now at 38,000 it's doing it again. The maintance manager said that it was reading a misfire at 2100 RPM's. Anyone else having or had this problem? Thanks, Stush.