My 2018 Outlander shuts off when I am driving it with no check engine lights on?

Hello, it is a serious issue for sure. The hardest thing in diagnostics is duplicating a client concern, because without that -- even if there is other data -- you can never really tell that a concern has been truly resolved. The most important thing you can do is collect information about what happens when the problem occurs and report it when taking your car in. Hot engine / cold engine? Long drive / short drive? High speed / low speed? Turns? Accessories being used? Anything at all that Is experienced before, during or after the concern? Stick with it -- you'll get it, if you can try and assess more information to share with the repair facility.