Knock Sensor

Knock (KS) sensor is mounted on engine block. KS detects detonation in cylinders and vibration from the engine. KS is a piezo electric element that converts vibration into a voltage signal which is then sent to ECM. ECM will retard timing based on this signal. Optima & Magentis (Canadian) (2.7L) is equipped with 2 KS, one located on each side of engine block. On Optima & Magentis (Canadian) (2.4L), KS is located on left side of engine block. On Rio, KS is located on right side of engine block. On Sedona and Sorento, KS is located on center of engine block, under intake manifold. On Spectra, KS is located behind intake manifold support bracket on engine block.