VIDEO: Is Your Engine Knock Sensor Working Properly?
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VIDEO: Is Your Engine Knock Sensor Working Properly?

The greater the vibration or shock, the higher the voltage and frequency. This video is sponsored by NGK Spark Plugs.

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The knock sensor is a piezoelectric accelerometer that acts as a microphone on the engine. It converts vibrations into alternating current (AC) signal. When the crystal inside the sensor is vibrated, it produces an AC voltage.

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The greater the vibration or shock, the higher the voltage and frequency. In this video we discuss how a knock sensor can fail, testing and diagnostics.

This video is sponsored by NGK Spark Plugs.

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