RIP Posted September 8, 2019 Share Posted September 8, 2019 After an ECU flash, is there any precautions you need to take when changing out the battery?? My concern is the ECU will return to the factory presets when disconnecting the battery Link to comment Share on other sites More sharing options...
1tondriver Posted September 8, 2019 Share Posted September 8, 2019 Swap it out. No issues, it will retain flash. 1 Link to comment Share on other sites More sharing options...
RIP Posted September 8, 2019 Author Share Posted September 8, 2019 10 minutes ago, 1tondriver said: Swap it out. No issues, it will retain flash. Thank you Link to comment Share on other sites More sharing options...
Beemer Posted September 9, 2019 Share Posted September 9, 2019 It's like your computer, if you unplug it, it retains everything. 1 Beemer Link to comment Share on other sites More sharing options...
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