Knock Sensors, Spark Knock is a knocking, rattling or pinging noise.

It could be heard when he engine is accelerating or is working hard under load.

Knock sensors are essentially listening devices that sits close to the engine, either on it, on the cylinder head, or on the intake manifold, and detects vibrations caused by an engine knock.


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Spark Knock – That Annoying Knocking, Pinging Or Rattling Sound

Engine Noise – Don’t Turn Your Back On Any Engine Noise

Engine Noise-Where Is It Coming From?-Is It Bad?

Why are automotive sensors so important today

Engine Knocking Pinging Rattling

The knock sensor senses the “spark knock” which is the condition inside the engine where the fuel begins to burn before its supposed to. The “spark knock” is also called the detonation, pre-ignition or pinging.

The knock sensor of your vehicle can malfunction due to various reasons. Mostly the sensor can go bad as the vehicle ages and may require a replacement. As time passes the wearing and tearing can occur on the sensor. It is also susceptible to corrosion and the functionality of the sensor can be affected.

The knock sensor can be tested for failure using two ways. You can either use an error code scanner or use a voltmeter to test the sensor’s efficiency. Both ways have their own advantages and disadvantages.

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