2018 Kia Optima — dealer cannot reproduce an intermittent warning — anyone dealt with this recently?

This is usually cheaper to test than to guess. Swap the cheap/easy piece first on the 2018 Kia Optima and see if the fault moves. If the cheap test changes it, stop and reassess. I'd want a dollar figure or a measured spec, not 'should be fine.' I keep a notes app thread for this now.

Log the conditions before you spend. Get a real battery/charging test on the 2018 Kia Optima, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. On “dealer cannot reproduce an intermittent warning —,” that was the fork that mattered for me. If you share a photo of the worksheet, easier to sanity-check. Climate here is different, so treat that as a local data point. Next check is the cheap one I can do in a driveway.

I wouldn't throw parts yet. Loaded-suspension checks on the 2018 Kia Optima catch play that a wheels-hanging inspection misses. If the cheap test changes it, stop and reassess. Do that first. I'll poke at it this weekend.