I got my check engine light on when I just passed 5k miles. Then, it turned off by itself in less than 24 hours. Two weeks ago, it came on again for 24-48 hours then the darn light turned off again.

I took it in for 10k service, then mentioned about the darn light. The dealer said that the computer keeps track of the error codes. It says that the car needs a new catalyc converter. They are going to call me when they have it in stock.

I am just wondering what could cause it to fail on my car. I always use Shell 87 from the start. Hmmm....