Klopsensor Omega B brings me to despair

Hey you freaks… The knock sensor of my Omi is still killing me! didn’t come through the tuv because of brilliant engine diagnosis!The examiner wrote something about environmental pollution, which I absolutely don’t understand, AU got my Omi without the smallest problem! Engine diagnosis returned;Knock sensor bank 1! So he was changed and the error deleted! After 100 meters of driving the control lamp again lit up again test returned:Knock sensor bank 1…! everything was measured cable-wise and k Ontrolliert, what went to control…everything Ok In the meantime the error has been deleted 5 times but the control lamp still lights up and so I don’t get my badge! Maybe someone has a clue what my omi suffers from? I am grateful for every tip!!!!