Woo woo sound from engine bay

I have a 2024 Tundra Limited, built August of '24. -7c this morning, but on any cold morning, there is a 'woo woo" sound coming from the engine bay. It's difficult to pinpoint where it's coming from. On cold starts it lasts a while, sometimes will continue even after the engine warms up fully and will become more prominent with acceleration. Has anyone else experienced this noise?

 

Welcome to the boards, try using the search tool...
https://www.tundras.com/threads/owl-hoot-noise-from-engine-turbo.152749/unread

 

Ah, my bad, I had searched a while ago. But I didn't think to put in owl noise, haha

 

sounds like perhaps a vacuum leak

 

Ha ha, yea mine made the Lionel toy train whistle when we had a real cold stretch last couple weeks.Sounds like I was in a hobby shop. Did it idling and a little bit at low speed driving. Seemed to go away at higher speed. Hasn't done it since the temperature got up in the 30's, and no check engine light. Going to mention it when it goes into service. But unless it's cold out, it won't do it. If you find out anything post what resolved it.