New GT issue

[mallard8]

Got a new to me 2021 GT, posted on here about getting info on the tune that was already on the car. Had to drive it back up to school and ran it on 93, and twice on the way up was using cruise control on the highway going about 65-70, car suddenly downshifted from 10th to 9th by itself and got up to about 5k rpm, light-colored smoke came out the exhaust both times. Got a "see manual" light, pulled over and it went away. Currently getting a P008A code for low pressure and also getting a "10th gear ratio incorrect" code after doing a scan. I am only aware of previous mods done that are visible such as headers, intake. Attatched a pic of engine bay, looks like there might have been some fuel system mods but I'm not as knowledgeable on that. Thanks

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