What is the fix for power transmission on ford fiesta 2016
What is a power transmission and what problems are you having with it. And isn’t this still under warranty?
I guess Julian means automatic transmission . The Fiesta has 3 year or 36000 mile warranty . But just asking what the fix is without explaining the problem makes it difficult to offer guidance.
This is a car with a known problem. It has been going on for years. We tried to warn shoppers about it here at CarTalk. There are multiple TSBs (technical service bulletins) for the Fiesta’s transmission. Read them here. Best of luck.
Or impossible to offer guidance? 
the best fix to repair a Ford Fiesta is to purchase a better car…