Hello, I have the Opel Astra H 2009 with the z16xer engine (1.6 gasoline). The error P0011 "Reference position of the inlet camshaft phase-matching mechanics - signal out of range (bank1)" flashed from the moment of purchase. In addition, there was a rattling noise in the engine, so I did a little research on the internet and found out that it was KZFR. After replacing, the rattling noise has stopped, but the error keeps repeating itself. I will add that the timing has been set on the locks and in my opinion it is OK, the engine runs smoothly. Has anyone had a similar problem? Can changing to a thicker oil help? (currently 5w30).