Fiat grande punto camshaft sensor

Hello i have fiat grande punto (2007) 1.4 8v petrol
few days ago check engine light appeared and it doesnt want to acceralate over 80 . After the computer test it was detected erorr P0011 and i changed camshaft sensor . Car worked normaly 200 km after that check engine appeared again and doesnt want to acceralate . After removing the battery car work ok . But check engine light is still on .

Does anyone have simmilar problem ? How to solve it ?