this post was submitted on 20 Dec 2024
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Showerthoughts
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That's fine, I just want the error codes displayed on the existing screens. No software necessary for that. Maybe a simple script at worst..
They want it to be known, otherwise there wouldn't be fail codes output to the OBDII port....
Yes. Why don't they display diagnostics error codes on the existing displays? I'm fine with special display modes and "secret" menu options.
That's only there because it's required by law since 1996, and only a small subset of those codes are actually standardized/required. Many of them are specific to vehicle manufacturer and are only known to the public due to leaked documentation.
Auto corporations don't want you to easily have diagnostic info beyond the most basic things (tire pressure for example), they want you to bring it back to them. They don't profit off you fixing it yourself.