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unless you’re willing to sniff CANBUS codes one by one
This would only be necessary for cars with climate control in the touchscreen right?
Or if you have other features you don’t want to downgrade. For example, my 2016 Mazda has errors, oil status, and a bunch of other system info accessed through the headunit.
But I’m a little data-obsessed right now, so I acknowledge I might be the weirdo