Hyundai Sonata LF: Engine Control System / Knock Sensor (KS) Repair procedures
| 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. 
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| • |
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.
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| 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)
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Description
Heated Oxygen Sensor (HO2S) consists of zirconium and alumina
and is installed both upstream and downstream of the Manifold Catalytic
Converter...
Other information:
Removal
1.
Turn the ignition switch OFF and disconnect the negative (-) battery cable.
2.
Disconnect the accelerator position sensor connector (A).
3.
Remove the mounting cap (A).
4.
Remove the installation bolt (A), and then remove the accelerator pedal module...
S..
Heated Oxygen Sensor (HO2S) Description and Operation