Altima GXE L4-2.4L (KA24DE) (1999)
![background image](/nissan/altima_gxe/l4-2.4l_(ka24de)/Page-956001.png)
Knock Sensor: Description and Operation
COMPONENT DESCRIPTION
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block
is sensed as vibration pressure. This pressure is converted into a voltage signal and sent to the ECM.