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Always capture a backup of the current setup and save it to the PC before you make any coding changes. I can't answer your specific question, but in my 997.1 I've never had to do that to implement a coding change and I've done a few, like comfort windows up and down with the key button, side markers as blinkers, enable multi-function steering wheel, etc.
Yeah, Instrument Custer has this additional requirement. When it opens the main page on the right where you click to go to coding there is a text box that says that ECU needs to be reset
Last edited by 318touring; Oct 9, 2020 at 06:58 PM.