What is causing a rattling noise when I accelerate? on 2004 Nissan Maxima

Sometime when I step on the gas to accelerate I hear a rattling noise. I think it might be the catalytic converter but not sure. I just had my emission done and passed 3 wks ago? It def sounds like its coming from underneath my car. Thank you for you responses they are greatly appreciated ! :)

Asked by for the 2004 Nissan Maxima
1 answer
Its important to get this checked out some of these engines ingested cat converter debris into the engine if the cat converter was failing causing engine damage but there is a bulletin from Nissan and I have seen it frequently where the exhaust heat shields below the engine fail causing a rattle on this engine.