2019 Audi S4 — battery dies after the car sits for a weekend — Tampa owner

I'd want a measurement, not a hunch. Move a coil or plug on the 2019 Audi S4 if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. That's the whole play. Checking again after work.

I'd want a measurement, not a hunch. Get a real battery/charging test on the 2019 Audi S4, not just resting voltage, before blaming a module. If the cheap test changes it, stop and reassess. Not gospel, but it saved me a headache. If this is nothing, great. I want that in data.

If it were in my driveway, swap the cheap/easy piece first on the 2019 Audi S4 and see if the fault moves. You'll know quickly if you're on the wrong tree. I'd want that in writing, not as a promise. I'd sleep better after that step, even if it finds nothing. Not driving it hard until I know more.

Ask what changed right before it started. If a shop can't duplicate it on the 2019 Audi S4, bring a video plus freeze-frame data, not just a story. You'll know quickly if you're on the wrong tree. Verbal 'we'll take care of it' is not a plan. Not driving it hard until I know more.

Tried a second charger / second scan and the story on the 2019 Audi S4 didn't change. Video is ugly but it shows the hesitation.

If it were in my driveway, move a coil or plug on the 2019 Audi S4 if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. If it doesn't change the out-the-door or the repair estimate, it's noise. I'm keeping receipts and dates in one folder.

Cleared nothing. I want service to see the alert on the 2019 Audi S4 first. Parking it somewhere I can hear it better next time.

Tried a second charger / second scan and the story on the 2019 Audi S4 didn't change. Checking again after work.

OP update: scanned the 2019 Audi S4 again and still only have the one pending code, no new lights. I refuse to clear codes until someone else sees them.

I'd want a measurement, not a hunch. Capture voltage while the 2019 Audi S4 is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. Any freeze-frame data saved? This is me being the wet blanket on purpose.

Ask what changed right before it started. A pressure test beats staring at a dry driveway if the 2019 Audi S4 is losing coolant with no puddle. That's the branch I'd chase this week. Keep sale price, fees, and rate as three different conversations. Cold start is when I can actually reproduce it.

Log the conditions before you spend. Loaded-suspension checks on the 2019 Audi S4 catch play that a wheels-hanging inspection misses. Don't erase codes until someone who can help has seen them. On “battery dies after the car sits for,” that was the fork that mattered for me. That's the whole play. This is the filter I use when the thread starts repeating itself. Might be overthinking it, but I'd rather overthink than overspend.

Intermittent stuff lies if you only catch it once. Write temp, speed, and in-gear vs coast when the 2019 Audi S4 does it — then decide on parts. That's the branch I'd chase this week. On “battery dies after the car sits for,” that was the fork that mattered for me. Run the total, not the monthly, before you commit. Wrote this up on my lunch break.

I wouldn't throw parts yet. Move a coil or plug on the 2019 Audi S4 if it's cylinder-specific and see whether the code follows. Don't erase codes until someone who can help has seen them. Do that first. Doing the boring step first on purpose.

This is usually cheaper to test than to guess. Loaded-suspension checks on the 2019 Audi S4 catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. If they can't show the line item, I assume it's hiding. A day of patience here is cheaper than a wrong part. I'd rather pay for diagnosis than a second guess-repair.

OP update: scanned the 2019 Audi S4 again and still only have the one pending code, no new lights. If the story changes I'll post the new data.

I'd want a measurement, not a hunch. Write temp, speed, and in-gear vs coast when the 2019 Audi S4 does it — then decide on parts. You'll know quickly if you're on the wrong tree. Do that first. I'd rather be boring and correct. Doing the boring step first on purpose.

I wouldn't throw parts yet. Loaded-suspension checks on the 2019 Audi S4 catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. Run the total, not the monthly, before you commit. I'd rather pay for diagnosis than a second guess-repair.

Log the conditions before you spend. Swap the cheap/easy piece first on the 2019 Audi S4 and see if the fault moves. Save the big job until that test fails. On “battery dies after the car sits for,” that was the fork that mattered for me. Write the result down so the next test isn't a repeat of the last one. I refuse to clear codes until someone else sees them.

Log the conditions before you spend. If a shop can't duplicate it on the 2019 Audi S4, bring a video plus freeze-frame data, not just a story. Don't erase codes until someone who can help has seen them. On “battery dies after the car sits for,” that was the fork that mattered for me. If they can't show the line item, I assume it's hiding. If your situation is the opposite, ignore me. Heat soak after errands is the other window.

I wouldn't throw parts yet. Two 2019 Audi S4s can feel identical and have different causes, so measure before you copy someone else's repair. Save the big job until that test fails. When does it actually happen? Not interested in a five-hour wait for a shrug.

Cleared nothing. I want service to see the alert on the 2019 Audi S4 first. If that fails I'll eat the diagnostic fee.

This is usually cheaper to test than to guess. Write temp, speed, and in-gear vs coast when the 2019 Audi S4 does it — then decide on parts. You'll know quickly if you're on the wrong tree. Verbal 'we'll take care of it' is not a plan. Checking again after work.

Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2019 Audi S4 and see if the fault moves. Don't erase codes until someone who can help has seen them. I'd want that in writing, not as a promise. Cold start is when I can actually reproduce it.

Checked the easy stuff on the 2019 Audi S4 and found one clue worth chasing before I book a shop. Happens in gear, not in park, for what that's worth.

Start with the test that can prove you wrong. Capture voltage while the 2019 Audi S4 is actually failing — after it restarts you've lost the clue. Don't erase codes until someone who can help has seen them. This is from a 2019 Audi S4 in Tampa with 141,000 miles. Keep sale price, fees, and rate as three different conversations. That's my plan before I call anyone.

Log the conditions before you spend. Capture voltage while the 2019 Audi S4 is actually failing — after it restarts you've lost the clue. Save the big job until that test fails. On “battery dies after the car sits for,” that was the fork that mattered for me. This is from a 2019 Audi S4 in Tampa with 141,000 miles. Stop there until you know. Video is ugly but it shows the hesitation.

If it were in my driveway, get a real battery/charging test on the 2019 Audi S4, not just resting voltage, before blaming a module. You'll know quickly if you're on the wrong tree. I'd want a dollar figure or a measured spec, not 'should be fine.' Doing the boring step first on purpose.

Cleared nothing. I want service to see the alert on the 2019 Audi S4 first. Cold start is when I can actually reproduce it.

Start with the test that can prove you wrong. Capture voltage while the 2019 Audi S4 is actually failing — after it restarts you've lost the clue. If the cheap test changes it, stop and reassess. Stop there until you know. I'm keeping receipts and dates in one folder.

Log the conditions before you spend. A pressure test beats staring at a dry driveway if the 2019 Audi S4 is losing coolant with no puddle. That's the branch I'd chase this week. On “battery dies after the car sits for,” that was the fork that mattered for me. Do that first. I'll poke at it this weekend.

Start with the test that can prove you wrong. Write temp, speed, and in-gear vs coast when the 2019 Audi S4 does it — then decide on parts. Save the big job until that test fails. Keep sale price, fees, and rate as three different conversations. I've seen both outcomes, which is why I'd test instead of assume. Trying not to diagnose from the couch.

It did battery dies after the car sits for twice this week, both times after sitting. No change in mileage feel. I'm keeping receipts and dates in one folder.

Tried a second charger / second scan and the story on the 2019 Audi S4 didn't change. If the story changes I'll post the new data.

Cleared nothing. I want service to see the alert on the 2019 Audi S4 first. I'm in no rush to be a hero on it.