Car Knock Sensors

Always hearing loud knocks from the engine compartment of your vehicle? Thanks to your knock sensor, your vehicle can actually communicate with you through these sounds. The knocks are actually high-frequency vibrations caused by detonation or the premature burning of fuel inside the engine cylinders. These knocks can be caused by several things: excess carbon deposits on the cylinders, extremely hot spark plugs, high combustion chamber temperatures, and out-of-tune ignition timing. Whatever the cause may be, it's important to eliminate the knocks. They can compromise engine performance or, worse, damage the engine parts.

Fact: vehicle engines work more efficiently and produce more power when they're operating near the detonation limit. And to allow the engine to operate near that limit without ever reaching it, most vehicles are equipped with knock sensors. A knock sensor is a piezoelectric sensor or accelerator mounted on the engine to detect any high-frequency vibration caused by detonation. The piezoelectric part of the sensor is engineered to generate voltage whenever a certain level of vibration is applied to it. Once signs of detonation are detected, the sensor sends a voltage signal to the engine control unit, which modifies spark timing to avoid detonation.

Fact: vehicle engines work more efficiently and produce more power when they're operating near the detonation limit. And to allow the engine to operate near that limit without ever reaching it, most vehicles are equipped with knock sensors. A knock sensor is a piezoelectric sensor or accelerator mounted on the engine to detect any high-frequency vibration caused by detonation. The piezoelectric part of the sensor is engineered to generate voltage whenever a certain level of vibration is applied to it. Once signs of detonation are detected, the sensor sends a voltage signal to the engine control unit, which modifies spark timing to avoid detonation.

While the possibility of knock sensor failure is low, it doesn't mean that you can ignore it. Like the other engine parts, the sensor needs to be properly maintained to avoid malfunctions. You can do this by regularly filling your vehicle with manufacturer-advised fuels. Also, whenever you get a tune-up, have your mechanic check the condition of the sensor. If, however, this advice is already too late and your vehicle's sensor is already damaged, you can count on Parts Train to provide you with a high-quality replacement for your vehicle. Remember that not all sensors, even if they fit properly on your vehicle's engine, are compatible with your engine. Check the exact specifications of your sensor in your owner's manual or consult a trusted mechanic. Make sure to buy a direct-fit unit, so that installation will be much easier.

For more than two decades, Parts Train has been the standard for online automotive retailing. Our catalog contains top-quality replacement parts and hard-to-find auto accessories, including a direct-fit knock sensor for your car. On top of that, we also offer low prices, fast delivery, and 24-hour customer service.
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