Electrical, Battery & StartingDIYCommunity Starter

Battery keeps dying after two or three days parked

EVGuy5Community StarterApr 23, 20262024 Toyota Tacoma TRD Off-RoadDallas–Fort Worth
2024 Toyota Tacoma TRD Off-Road, about 14,500 miles. Battery tested okay at a parts store, but if the car sits for a weekend it sometimes won't crank. Alternator voltage looks normal while running. How would you narrow down a parasitic draw without pulling every fuse blindly? If I fix it I'll come back and update the thread. Ambient temp was about 84°F when I noticed it.
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20 replies

ApexSeller17Community StarterCommunity StarterApr 23, 2026permalink
Intermittent stuff lies if you only catch it once. Capture voltage while the 2024 Toyota Tacoma is actually failing — after it restarts you've lost the clue. Save the big job until that test fails. On “battery keeps dying after two or three,” that was the fork that mattered for me. Keep sale price, fees, and rate as three different conversations. Climate here is different, so treat that as a local data point. I refuse to clear codes until someone else sees them.
TireEnthusiast98Community StarterCommunity StarterApr 23, 2026permalink
If it were in my driveway, move a coil or plug on the 2024 Toyota Tacoma if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. Had a similar mess a couple years ago and that's what finally sorted it. I'm keeping receipts and dates in one folder.
EVGuy5Community StarterCommunity StarterApr 23, 2026permalink
It did battery keeps dying after two or three twice this week, both times after sitting. No change in mileage feel. If that fails I'll eat the diagnostic fee.
TireEnthusiast98Community StarterCommunity StarterApr 23, 2026permalink
Intermittent stuff lies if you only catch it once. Get a real battery/charging test on the 2024 Toyota Tacoma, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. On “battery keeps dying after two or three,” that was the fork that mattered for me. Learned this the expensive way on a previous car. Climate here is different, so treat that as a local data point. Next check is the cheap one I can do in a driveway.
EVGuy5Community StarterCommunity StarterApr 25, 2026permalink
It did battery keeps dying after two or three twice this week, both times after sitting. No change in mileage feel. If the story changes I'll post the new data.
EVGuy5Community StarterCommunity StarterApr 23, 2026permalink
It did battery keeps dying after two or three twice this week, both times after sitting. No change in mileage feel. Wrote this up on my lunch break.
BoxerNomadCommunity StarterCommunity StarterApr 23, 2026permalink
Ask what changed right before it started. A pressure test beats staring at a dry driveway if the 2024 Toyota Tacoma is losing coolant with no puddle. Save the big job until that test fails. Run the total, not the monthly, before you commit. I'll poke at it this weekend.
RustMomCommunity StarterCommunity StarterApr 24, 2026permalink
Agree — and I'd add this: Get a real battery/charging test on the 2024 Toyota Tacoma, not just resting voltage, before blaming a module. That's the branch I'd chase this week. On “battery keeps dying after two or three,” that was the fork that mattered for me. Did the worksheet show tax yet? Climate here is different, so treat that as a local data point. I'm in no rush to be a hero on it.
WrenchWrenchCommunity StarterCommunity StarterApr 24, 2026permalink
This is usually cheaper to test than to guess. If a shop can't duplicate it on the 2024 Toyota Tacoma, bring a video plus freeze-frame data, not just a story. That's the branch I'd chase this week. If you share a photo of the worksheet, easier to sanity-check. I'd rather pay for diagnosis than a second guess-repair.
BoxerNomadCommunity StarterCommunity StarterApr 24, 2026permalink
I wouldn't throw parts yet. A pressure test beats staring at a dry driveway if the 2024 Toyota Tacoma is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. Run the total, not the monthly, before you commit. I've seen both outcomes, which is why I'd test instead of assume. Wrote this up on my lunch break.
EcoBuilder86Community StarterCommunity StarterApr 24, 2026permalink
This is usually cheaper to test than to guess. Get a real battery/charging test on the 2024 Toyota Tacoma, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. Verbal 'we'll take care of it' is not a plan. I'll poke at it this weekend.
ApexSeller17Community StarterCommunity StarterApr 24, 2026permalink
Log the conditions before you spend. Write temp, speed, and in-gear vs coast when the 2024 Toyota Tacoma does it — then decide on parts. You'll know quickly if you're on the wrong tree. On “battery keeps dying after two or three,” that was the fork that mattered for me. This is from a 2024 Toyota Tacoma in Dallas–Fort Worth with 14,500 miles. Time, temperature, and whether it's in gear are the notes that actually help a shop. If your situation is the opposite, ignore me. I refuse to clear codes until someone else sees them.
DetailTunerCommunity StarterCommunity StarterApr 24, 2026permalink
Asking because it changes the advice: Loaded-suspension checks on the 2024 Toyota Tacoma catch play that a wheels-hanging inspection misses. If the cheap test changes it, stop and reassess. If you share a photo of the worksheet, easier to sanity-check. I've seen both outcomes, which is why I'd test instead of assume. Cold start is when I can actually reproduce it.
WrenchWrenchCommunity StarterCommunity StarterApr 24, 2026permalink
I'd want a measurement, not a hunch. Get a real battery/charging test on the 2024 Toyota Tacoma, not just resting voltage, before blaming a module. You'll know quickly if you're on the wrong tree. This is from a 2024 Toyota Tacoma in Dallas–Fort Worth with 14,500 miles. If you share a photo of the worksheet, easier to sanity-check. I'm in no rush to be a hero on it.
EVGuy5Community StarterCommunity StarterApr 24, 2026permalink
Tried a second charger / second scan and the story on the 2024 Toyota Tacoma didn't change. I already checked the easy fluid levels.
DetailTunerCommunity StarterCommunity StarterApr 24, 2026permalink
Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2024 Toyota Tacoma and see if the fault moves. If the cheap test changes it, stop and reassess. Post the numbers (or the code) and people can get more specific. I'll poke at it this weekend.
DetailTunerCommunity StarterCommunity StarterApr 24, 2026permalink
I'd want a measurement, not a hunch. Get a real battery/charging test on the 2024 Toyota Tacoma, not just resting voltage, before blaming a module. That's the branch I'd chase this week. Happy to compare notes if your setup is different. Not trying to scare you — just skip the expensive first guess. I'm keeping receipts and dates in one folder.
EcoBuilder86Community StarterCommunity StarterApr 24, 2026permalink
This is usually cheaper to test than to guess. Get a real battery/charging test on the 2024 Toyota Tacoma, not just resting voltage, before blaming a module. You'll know quickly if you're on the wrong tree. Verbal 'we'll take care of it' is not a plan. That's coming from doing this as an owner, not a shop. I'm keeping receipts and dates in one folder.
BoxerNomadCommunity StarterCommunity StarterApr 24, 2026permalink
If it were in my driveway, get a real battery/charging test on the 2024 Toyota Tacoma, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. I'd want a dollar figure or a measured spec, not 'should be fine.' This is me being the wet blanket on purpose.
ApexSeller17Community StarterCommunity StarterApr 24, 2026permalink
Start with the test that can prove you wrong. Loaded-suspension checks on the 2024 Toyota Tacoma catch play that a wheels-hanging inspection misses. You'll know quickly if you're on the wrong tree. This is from a 2024 Toyota Tacoma in Dallas–Fort Worth with 14,500 miles. Write the result down so the next test isn't a repeat of the last one. If it repeats twice more I'll book time.
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