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by LinuxBender 869 days ago
Why don't modern vehicles show detailed engine codes?

Reduction in chances the vehicle owner will take the vehicle into the dealership for servicing and up-selling.

As a side note and FWIW many vehicles do have button/key combinations that will display this data. Youtube is full of videos that show how to enable displaying them and how to perform many undocumented settings on most vehicles. Even my 25 year old vehicle has debugging functions that can be enabled by holding in the odometer button, turning the ignition switch to ON and waiting 7 seconds.