[ndjshe3838]

Some possible reasons:

* Better for mechanics as it’s standardized and they don’t have to figure out the UI of every car model to read the codes (if I were a mechanic I’d definitely prefer just plugging in the meter)

* The debugging is decoupled from the infotainment/dash so it’s more reliable, it would be pretty dumb if you had to have a working infotainment system to read engine codes

* An OBD meter is like $20?

* Historically a lot of cars probably had no display for showing codes