Based on your original posting I would say exhaust. Based on this, it could deal with the catylatic converter or an oxygen sensor. Both are part of the exhaust system / emission system.
Here is what I recommend. Take the car to a nationally recognized parts store and have them scan the computer for codes. If the light is on, there will be a code stored which will lead us to the problem. Also, most parts stores will scan it for free, so there is no money out of pocket for you.
Have that done and let me know what you find.
Wednesday, November 4th, 2009 AT 7:35 PM