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

Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Remove the intake manifold (Refer to “Intake And Exhaust System” in EM group).
3.
Disconnect the injector connector (A).
4.
Remove the installation bolt (B), 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. If the component has been dropped, inspect before installing.
1.
Install in the reverse order 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 Manifold Catalytic Converter. The sensor output voltage varies in ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Description and Operation
OBD-II review 1. Overview The California Air Resources Board (CARB) began regulation of On Board Diagnostics (OBD) for vehicles sold in California beginning with the 1988 model year. The first phase, OBD-I, required monitoring of the fuel metering system, Exhaust Gas Recirculation (EGR) sy ...

Hyundai Sonata LF 2014-2019 Service Manual: Knee Airbag (KAB) Module Repair procedures
Removal 1. Disconnect the battery negative cable and wait for at least three minutes before beginning work. 2. Remove the crash pad lower panel. (Refer to Body - "Crash Pad Lower Panel") 3. Remove the mounting nuts (A). 4. Disconnect the knee airbag connector (B). Installation ...

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