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  1. Need help with MHD tune error on ECU made in 2019 (Failed to write ECU)

    I purchased my vehicle December 15, 2021. It is a 2020 Launch edition. I have just now gone to tune my vehicle with an MHD OTS map and I am receiving an error that stops flashing the ECU at 2-3% every time. The ECU build date is 2019.02.09 which is why I am confused, as the DME unlock check is...





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