[squidgedcricket]

Do any modern cars have OBD readers integrated into the infotainment system?

It seems like a no brainer to show the error code w/ a description. Though that might decrease the number of dealer visits compared to a non-descriptive check engine light.

[alexbock]

Tesla vehicles display error descriptions prominently whenever an error code is presented, and detailed error diagnostics are available for anyone to browse in the service mode menu on the touchscreen. (Service mode is publicly accessible but does require looking up online how to open it.)