Po322 dtc code

[Rubregis42]

I have a 2006 a4 1.6 estate which sometimes runs fine sometimes not! so i plugged in my diagnostic reader and got the milf light erased but also got this code p0332 which i ve checked on the bentley code list and found its a crankshaft sensor so is it best to take it off and clean it or just buy another one if so does anyone know the part number ? Think mine is b7 1.6 ltr engine thanks