En video som visar grafiskt hur en bils knacksensor fungerar och hur man allmänt felsöker denna och vilka dem vanligaste felen är och uppstår.

Explains the Knock Sensor Operation and Testing. The Knock sensor is a actual microphone screwed into the engine block. It is tuned to listen to the exact frequency of an engine knock, which is a high frequency ping. A failing knock sensor will cause all sorts of problems to engine operation, such as skewed timing controls, loss of performance and power and ever the system going to linp-in mode.