VIDEO: Engine Knock Sensor Problems

VIDEO: Engine Knock Sensor Problems

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

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.

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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