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Also as an update the new alternator was put in today and nothing changed. He tried charging my battery for 8 hours and it wouldnt hold a charge. He swapped in a battery he had in the shop and the battery held a charge but would turn over still.
The car was still cranking like there was no gas and the 3 codes appeared again U0109 (fuel pump lost connection), u0121 (brake lost connection), and u0140 (bcm lost connection.
He said he's gonna have someone come to the shop to reflash the bcm to make sure it didn't get corrupted or something from losing power when the batteries died
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