I have a 2018. Check engine light was on when I took it in for recall. They told me it was low exhaust temp. Said there was a flash to fix. No more trouble so far
I bought a: "BlueDriver Bluetooth Professional OBDII Scan Tool for iPhone, iPad & Android" that I enjoy. Gives me codes, erases codes and provides optics on EGR. BlueDriver has a substantial library of codes also.