My check engine light came on while driving today, still have my warranty so we took it in to toyota and turns out it needs a new catalytic converter and head. The guy who leased my car before me was in his late 20's im told. He had added a carbon fiber dash, and a gts emblem on the 01 gt, i think he really dogged the car and thats what caused those 2 things to go out, but i have no clue what they are and if they could have caused the problems due to racing or driving it hard, also i had to get new tires recently because they were so bald. The guys at toyota said this problem rarely happens with a car, and hopefully they wont think its due to me driving it hard, because i have rims. They gave me a 04 camry to drive while my car is being fixed, its huge! i had to manuveur into a parking spot like 3 times today, but its got a enormous little box area between the two seats that i like, and a sun glasses compartment between the visors, outside temp reading, but i hate out the lights arn't automatic.