2022 efi 20hp engine light and buzzer help

[waterlife]

I have a 2022 Mercury EFI 20 hp outboard that went in the drink I pulled it out pickled it myself now have the engine light and buzzer on constantly after giving it some RPMs for a few seconds and dropping to an idol they go off and Buzz and blink a few times I have unplugged the buzzer it's annoying after a while I've gone through cleaned all the connections done everything I could possibly think anyone have any input for me it'd be greatly appreciated thank you for your time