Hey guys for a while now on vag.com my car has brought up a knock sensor code saying signal to high or something similar. This has been the case for the past 3 years so I dont think and hope it can not be anything serious. I have ordered a green plugged sensor but I also notice there is a blue plugged one as well. Does anyone have any experience with similar faults and have any info? I maybe should have ordered both sensors and just replaced them both?