Kia Forte: Engine Control System / Knock Sensor (KS)

Specifications

Description and operation

Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knocking.

When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. When a knock occurs, the sensor produces voltage signal. The ECM retards the ignition timing when knocking occurs. If the knocking disappears after retarding the ignition timing, the ECM will advance the ignition timing. This sequential control can improve engine power, torque and fuel economy.

Schematic diagrams

Harness Connector

Repair procedures

4.	Install in the reverse order of removal. • Install the component with the specified torques. • Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.