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The computer has been flashed. You confirmed this when you found the the cut PTC circuit upon battery removal. You re-confirmed it when you installed the pack with the circuit restored and related errors were shown. And you re-confirmed it one more time when you restored the PTC circuit to its as-removed state and related codes went away.
P1449 is a failed battery pack. You did not successfully recondition your pack. Unfortunately, too many people are duped into believing this is an easy and usually successful exercise when it usually isn't. Most "reconditioning" descriptions are woefully inadequate to establish that sticks will perform in the car.
Steve
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