this post was submitted on 05 Dec 2023
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OBDII has standard info that's the same from one brand to another but it also transfers proprietary info that depends on the reader having the ability to interpret it.
My OBDII Bluetooth dongle lets me get diagnostic codes for much more than emission systems (using Car Scanner app where you choose the type of car you're diagnosing) and it also allows me to reprogram car features with the right app (ex adding an Europe only feature to a Canadian BMW i3 with Bimmercode). It would be perfectly adapted as an EV diagnostic port.
Hell I just use mine to collect data in general. Torque (https://torque-bhp.com/) is effectively my second dashboard for all the information that the normal dash doesn't show. I have a hybrid... Half of my dials are related to the hybrid system. Anyone that says that OBD is only related to combustion engines are ignorant.
Yep, so much info we don't get on the OEM dashboard anymore... Oil temp (heck, coolant temp in some cases!), voltage, oil pressure...
On some hybrids I've even seen the RPM gauge (tachometer) missing. And while I understand that isn't directly translatable to electric vehicles... It's just a point that the dash has been getting over simplified for a long time now, taking away knowledge from users.