Hi,
Just bought a 2018 EcoDiesel and the check engine light came on at 288 miles. I went to Auto Zone and had them run a code on it. Has anyone else had this issue? Is this common?
Welcome! Likely just a bad Nox sensor. Should be fine to drive until you get it back to the dealer. Emissions is something that can give problems early and quick.. just part of modern diesels.