Hi,
The Transmission Control Unit has the ability to store up to 40 fault codes. I would simply keep an eye on it for now and if the problem occurs again, a trip to the Dealer can download the faults and determine the actual cause.
In this case, since you got it working properly and it hasn't reoccured, I'd just chalk it up as a hiccup. Hope this helps...
Happy Motoring!...Jim'99
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