List of options to plug into data / diagnostic port?
I've skimmed a ton of threads talking about hardware/software 'plugged in' to the data / diagnostic port. It's a bit overwhelming. I'd like the ability to at least easily read error codes, but there appears to be potentially much more you can do, like create digital gauge panels, write as well as read from the ECM, etc.
Can anyone give me something like a high-level overview of what options are possible? I don't want to do something like purchase a scan tool and then find out I could have had a whole lot more cool functionality I didn't know to implement, or how to implement.
Thanks in advance. 2004 IC 3800 / t444e / Allison 2000
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