Kia Optima Hybrid: Engine Control System / Knock Sensor (KS) Repair procedures

Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
2.
Drain the engine coolant (Refer to “Cooling System” in EM group).
3.
Remove the radiator upper hose (Refer to “Cooling System” in EM group).
4.
Disconnect the knock sensor connector (A).

5.
Remove the intake manifold (Refer to “Intake And Exhaust System” in EM group).
6.
Remove the mounting bolt (A), and then remove the sensor from the cylinder block.

Installation
   
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.
1.
Install in the reverse order of removal.

Knock sensor mounting bolt:
18.6 ~ 23.5 N.m (1.9 ~ 2.4 kgf.m, 13.7 ~ 17.4 lb-ft)

Knock Sensor (KS) Schematic Diagrams

Circuit Diagram ...

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