Hello, i recently was jacking up my 01 GP GT in order to check some brake pads and rotors. anyway, as i was looking under my car looking for a good spot to jack it up, i noticed what looked like steam/smoke coming from where the exhaust system start, right by the engine. who knows how long this has been going on.. should it be something i should be concerned about, or just ignore it because she does have just shy of 200,000 miles on her?