One assumes your car has the AL4 gearbox.
Look for an automatic transmission repair shop that has the Clip software and repairs French transmissions like the AL4. With a bit of luck it will only need a fluid change and a reset. If it needs the two EMV valves it should be appx ÂŁ500 where they will change the fluid and do the reset anyway so the fluid will last another 32,000 miles. With any Renault/Citroen /Peugeot you need to look up the forums for your car and go onto YouTube and check out videos on problems with your make and model. You will lean a lot !
One forum:
https://www.honestjohn.co.uk/forum/post/index.htm?t=84272
Another
https://www.thepeugeotforums.com/threads/big-problems-with-206-automatic-transmission.332/
More out there waiting for your search
Hffhy
April 2022