Hyundai Elantra: Engine Control System / Knock Sensor (KS) Repair procedures

Hyundai Elantra AD (2016-2020) Service Manual / Engine Control/Fuel System / Engine Control System / Knock Sensor (KS) Repair procedures

Removal

1.	Turn the ignition switch OFF and disconnect the battery negative (-) cable.

2.	Disconnect the knock sensor connector (A).

3.	Remove the intake manifold. (Refer to Engine Mechanical System - "Intake Manifold")

4.	Remove the installation 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.

Installation is reverse of removal.

Knock sensor installation 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 ...

Heated Oxygen Sensor (HO2S) Description and Operation

Description Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed both upstream and downstream of the Catalytic Converter. It varies in accordance with the air/fuel rat ...

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Hyundai Elantra AD (2016-2020) Service Manual: General Safety Information and Caution
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