A knock sensor detects abnormal vibrations characteristic of spark knock,and then signals the computer to retard ignition timing accordingly.Knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged.

How to test the knock sensor:
1、Use manufacturer data to identify the knock sensor output circuit.
2、ConnectPicoScope channel Ato the Knock Sensor output circuit.
3、Minimise the help page and with the example waveform on your screenPicoScopehas
4、already selected suitable scales for you to capture a waveform.
5、Start the scope to see live data.
6、Simulate an engine knock bytapping lightly on the engine block with a metallic objectand observe your screen.
7、With your waveform on screen stop the scope.
8、Use the Waveform Buffer, Zoom and Measuring tools to examine your waveform.

Replacement for:
2010-2012 for Hyundai Santa Fe 2.4L
2013-2014 for Hyundai Santa Fe Sport 2.4L
2007-2015 for Hyundai Sonata 2.4L
2011-2014 for Hyundai Tucson 2.0L
2010-2014 for Hyundai Tucson 2.4L
2010-2013 for Kia Forte 2.0L
2010-2011 2013 for Kia Forte 2.4L
2010-2013 for Kia Forte Koup 2.0L
2010-2011 2013 for Kia Forte Koup 2.4L
2010 for Kia Magentis 2.4L
2009-2015 for Kia Optima 2.4L
2009-2010 for Kia Rondo 2.4L
2011-2015 for Kia Sorento 2.4L
2011-2014 for Kia Sportage 2.4L