Changing custom key value in "locked" E67 ECM

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I've got an ECM that has a custom key applied to it. I've got the custom key, and I can read/write when using the custom key. However, I'd like to switch the ECM to just use the standard EFILive key, so I don't have to mess with the custom key field every time I want to tweak this one.

Is there anything that can be done to remove (or change) the key?

[Blacky]

Assuming you have a FlashScan and not an AutoCal, you should be able to use the V7 software to revert the key back to the stock key using the Locking/Unlocking option and by supplying the custom key value that you already have.

Regards
Paul

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I do, thanks!