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Why don’t EVs have standard diagnostic ports—and when will that change? | OBD-II was implemented to monitor emissions, but EVs don't have tailpipes. (arstechnica.com)

submitted 9 months ago by [email protected] to c/[email protected]

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Why don’t EVs have standard diagnostic ports—and when will that change? | OBD-II was implemented to monitor emissions, but EVs don't have tailpipes.::OBD-II was implemented to monitor emissions, but EVs don't have tailpipes.

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[–] [email protected] 9 points 9 months ago

I think it's worth noting that the obd-2 protocol required by law is ONLY for emissions related parameters. Knock, air/fuel ratio, throttle position, things like that. A lot of manufacturers can get data that's not emissions related (like transmission codes) from the obd-2 port, but with a different/extended proprietary protocol that requires a proprietary (very expensive) scanner.

Basically, I think obd-2 should be expanded to include these other systems and ev systems as well. That would standardize ev diagnostics and non-emissions-related ice diagnostics too, which would be a boon for repairability.