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What is a knock sensor for, signs of a knock sensor malfunction and how to check a knock sensor. You will learn all about this in this video. As for the knock sensor for AvtoVAZ, its resistance should be up to 10 MOhm. My device was not able to measure such resistance (00:15 - what is a knock sensor 00:40 - what is a knock sensor for 1:44 - signs of a knock sensor malfunction 3:00 - checking the knock sensor (3 ways)