Gearbox failure message

[Byro]

Hi All

I bought a 2011 A7 a month ago and all been well except the last two mornings gone to press stop start its shown up message and cut out

Reset then tried again and all fine no driving issues

Changed key fob battery as had in the other day just to check for codes fir peace of mind and it said low but nothing else in codes 

Could it possibly be the stop start not being pushed for long enough trying to eliminate any minors before it gets coolant valve checked ad this seems a usual problem

Mant thanks for any input