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. |
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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:
C..
Replacement
•
Put on gloves to protect your hands.
•
When prying with a flat-tip screwdriver or use a prying trim
tool, wrap it with protective tape, and apply protective tape around the
related parts, to prevent damage...
Heated Oxygen Sensor (HO2S) Description and Operation