I hear it when Im stopped at a light or just idling. It's a low droning (knock) sound. At first I thought
the engine was knocking so I put premium gas but that did not solve the annoying sound.

Anyone had this problem and what was the fix?

Thanks

 

Had the same thing.....turns out had no oil....no oil light and not long overdue for a change but no oil! ???

 

You should be checking your oil regularly anyways

this may help
https://www.chryslerforum.com/m_5835/tm.htm