The same problem was present when I bought my car, we showed the masters and the sensor will change, they asked for a lot of money, I researched a little and decided to do it myself from the internet. As a price of 50 pounds 20 pounds Aliexpressin değiştirdim.türkiye receive a price like this var.parç (
https://www.otoyedekmarket.com/urun/peugeot-206-radyator-ek-depo-seviye-musur a ) placed on the side of the water tank sensor.You can understand from the photo here (
https://www.duyukoto.com/PEUGEOT-206-RADYATOR-EK-SU-DEPOSU-14HDI-2001-2004,PR-5030.html ) It is very easy to install. First, pull the antifreeze in the tank with something like a serum hose and pour it into the bottle. Then you need to remove the socket of the sensor. You can see that there is a thin wire clip and you can remove the socket when you remove it. Then slowly pull the Sensor to the left, pull it out, insert it, insert the new one, and plug the socket back in. When you put back the antifreeze that you last emptied, start the vehicle for a few minutes without closing the lid of the water tank, then close the lid, then there may be a loss. This process is done in two minutes. I tried very hard for this problem. I tried everything from completely removing and washing the radiator tank, but sensor replacement is a radical solution. Let's take it easy :)