2024 Kia EV9 — battery dies after the car sits for a weekend — Cleveland owner

OP update: scanned the 2024 Kia EV9 again and still only have the one pending code, no new lights. If the story changes I'll post the new data.

I'd treat 12V warnings as a no-ignore. On the 2024 Kia EV9, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. Then you'll know the next fork. On “battery dies after the car sits for,” that was the fork that mattered for me. Did the worksheet show tax yet? If your situation is the opposite, ignore me. I'm in no rush to be a hero on it.

Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Kia EV9 — site sharing and pack temp change the curve a lot. Then you'll know the next fork. Run the total, not the monthly, before you commit. I've seen both outcomes, which is why I'd test instead of assume. I already checked the easy fluid levels.

Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2024 Kia EV9 charge sessions. That's where I'd start. Any freeze-frame data saved? Happens in gear, not in park, for what that's worth.

I'd treat 12V warnings as a no-ignore. On the 2024 Kia EV9, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. That's where I'd start. On “battery dies after the car sits for,” that was the fork that mattered for me. If it doesn't change the out-the-door or the repair estimate, it's noise. Next check is the cheap one I can do in a driveway.