OBD2 Port Always Energized

Yes.
With the car off my Carista’s Red LED illuminates. With the car on it displays a Blue LED.
Just because there is voltage to the ODBII doesn’t mean it’s drawing current with no device plugged in. I think.

 

That's by design. Why do you want to disable it, thinking it's a drain?

That's how memory saver cables work btw: cord that runs from your jump pack to the OBD port, with just the power pins.

 

I was going to say, yeah, that's the module's responsibility. The + 12V pin on the diagnostic port is always powered (that's part of the standard), so devices that are built to be left plugged in have to have some criteria for turning themselves off so they don't keep consuming power when the car's off. (I think the ScanGauge II normally uses engine RPM as a heuristic for when to put itself to sleep, but also has a "hybrid mode" selectable during setup that makes it look at other activity also, so it doesn't sleep every time the engine stops.)

 

You should have purchased an odb2 adapter with a sleep mode feature.....like the ODBLink LX.

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