Yea the SES light comes on for a few moments always when U start the car, this is normal. Now if what youre saying is that it just sits there on all the time when the car is off then there is something wrong for sure.
The dangling sound could be loose exhaust components, something in the trunk, you need to be more specific on that one unfortunately.
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<img src='http://members.cox.net/inelson5/wooani.gif' border='0' alt='user posted image' /> The whistles go WOOOO!!! *BUBB RUBB FAN CLUB*