2018 Volvo S90 — battery dies after the car sits for a weekend

Start with the test that can prove you wrong. Get a real battery/charging test on the 2018 Volvo S90, not just resting voltage, before blaming a module. Save the big job until that test fails. This is from a 2018 Volvo S90 in Washington DC with 63,500 miles. I'd want a dollar figure or a measured spec, not 'should be fine.' Worth doing even if the car feels fine right now. Not driving it hard until I know more.

This is usually cheaper to test than to guess. A pressure test beats staring at a dry driveway if the 2018 Volvo S90 is losing coolant with no puddle. Save the big job until that test fails. If it doesn't change the out-the-door or the repair estimate, it's noise. Make the next action something you can finish this week. Checking again after work.

Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2018 Volvo S90 and see if the fault moves. You'll know quickly if you're on the wrong tree. Have you gotten a second quote in writing? That's my plan before I call anyone.

I'd want a measurement, not a hunch. Swap the cheap/easy piece first on the 2018 Volvo S90 and see if the fault moves. That's the branch I'd chase this week. Any freeze-frame data saved? I'd sleep better after that step, even if it finds nothing. I refuse to clear codes until someone else sees them.

OP update: scanned the 2018 Volvo S90 again and still only have the one pending code, no new lights. Doing the boring step first on purpose.

Tried a second charger / second scan and the story on the 2018 Volvo S90 didn't change. Next check is the cheap one I can do in a driveway.

I'd want a measurement, not a hunch. A pressure test beats staring at a dry driveway if the 2018 Volvo S90 is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. Write the result down so the next test isn't a repeat of the last one. If this is nothing, great. I want that in data.