Author name: Michael Seeley

Michael Seeley is a veteran automotive mechanic with more than 30 years of hands-on experience working on cars, trucks, and SUVs. He founded GarageSee to share practical automotive knowledge, troubleshooting advice, and repair guidance based on decades of experience in the workshop.

detects engine knocking sounds
Engine Components

What Does A Knock Sensor Actually Detect

A knock sensor detects high-frequency vibrations caused by abnormal combustion events like knocking, pre-ignition, or pinging within your engine. It uses a piezoelectric crystal to convert these vibrations into electrical signals, focusing on frequencies between 5-15 kHz. These signals indicate irregular explosions or detonation inside cylinders, which can harm the

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