Sewer odor in 3000QB Master Bedroom

[geesabl1]

I have recently noticed a strong sewer order that seems to be originating in the master bedroom of our 2020 Imagine 3000QB. I noticed there is a roof vent that exits the roof above the wall that separates the master bedroom and the shower. Could there be a problem with this vent? I checked to see if the odor was stronger from one of the bathroom drains (sink or shower) and does seem to be clearly coming from somewhere in the bedroom. Are the air admittance valves (AAV) I should be checking/replacing and if so where are the located?

[Country Campers]

There would be an AAV valve under the sink , it may be up high close to the sink or controls not down low where it would be visible , also one under the kitchen sink. The grey and black tanks will only vent thru the roof these will not have an AAV valve. The vent pipe may have come out of the attachment point into the tank allowing odors to enter the inside of the RV. I am not sure if you would have access to the top of the tanks from your pass thru storage area.

Brian