Kia Optima: Knock Sensor (KS). Description and Operation - Engine Control System - Engine Control/Fuel System - Kia Optima TF 2011-2021 Service ManualKia Optima: Knock Sensor (KS). Description and Operation

Description

Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knocking.

When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. When a knock occurs, the sensor produces voltage signal. The ECM retards the ignition timing when knocking occurs. If the knocking disappears after retarding the ignition timing, the ECM will advance the ignition timing. This sequential control can improve engine power, torque and fuel economy.


Installation
Install the component with the specified torques. Note that internal damag ...

Knock Sensor (KS). Specifications
Specification Item Specification Capacitance (pF) 850 ~ 1,150 ...

See also:

Components and Components Location
Components Location 1. ECM (Engine Control Module)2. Manifold Absolute Pressure Sensor (MAPS)3. Intake Air Temperature Sensor (IATS)4. Engine Coolant Temperature Sensor (ECTS)5. Throttle Positio ...

Active Air Flap(AAF) Troubleshooting
Troubleshooting SymptomsPossible CausesRemedyWarning illuminated"Check active air flap system"Active Air Flap System Fail(Flap stuck)• Inspect the flap and remove the foreign substance• Check ...

Replacement
1. Disconnect the battery negative cable from the battery and then wait for at least 30 seconds. 2. Turn the steering wheel so that the front wheels can face straight ...

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