No error code display on the car but when during when accelerating, the car rattles. I thought something was loose in the muffler so I took it to a gas station service station to check it out. The service manager did a visual inspection and shake the muffler and couldn't find anything loose. He says everything looks good, no issue nothing is loose nor he sees any hole in the pipes. The rattling bothers me and is this something that can be fix or I have to bring it back to the car dealer for service? Should I be worry there's something more serious going on?
Still sounds like possibly a heat shield which sometimes can be tricky or temperature related to find. What kind of gas are you using?
@r4nier - We always use fill with premium gas as the car is still relatively new (2018) and have very low mileage. Most of the routes are local so it may not be temperature related.