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Shortly after my panic post, I searched if any others have ran into a similar issue before and was advised to reseat the connection at the OBD port. I ended up doing that but it did nothing.
Also read reports of low voltage or voltage drops, so I plugged in my cigarette volt meter and it was at 12.30V with the ignition on. I had just driven for about an hour previously running errands, so it shouldn't be too low.
I noticed that sometimes it'll say "Key ON and confirm" right away and sometimes it'll try to communicate with the ECU then say that. So I just kept trying to flash the stock tune file multiple times. I know this isn't good because all signs seem to point to me not having a solid connection.
I would say maybe on the fourth time, it started writing! But the new thing that I noticed is on the bottom, the battery voltage showed up in yellow reading 12.29V, similar to the 12.3V on my voltmeter. I've flashed tunes back and forth over the last 4 years and never saw that battery voltage displayed before. It took its time writing and I was just hoping it wouldn't error out on me again. After a few minutes it finished and I completed the tune and the engine cranked just fine.
Crisis averted!
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