My 2018 VW Jetta's Check Engine Light is on... what's wrong?

I recently started noticing my '18 VW Jetta's Check Engine Light has come on and I'm trying to figure out what's going on. The light came on about 500 miles ago, but so far no specific error codes have popped up on the OBD-II reader. Anyone else experience this or know where I should start troubleshooting?