I managed to destroy my Authenticator keys and just got re-enabled by Coinbase. So, any time that I had been asked for my Authenticator code it would fail.
It depends on how you recover your 2FA Authenticator. If you can get it back without the need for the support team it will not take any time you need to Sign in to your account with old 2-step verification code. open Security Settings page and regenerate your secret key
If you need the support team they will ask you for your IDs and you may need to wait a week or more.
So, my question is under what circumstances is one asked for an Authenticator code?
You need to use it every time you do something about your balance and you can change the settings to request it in every process.