Knocking is a phenomenon characterized by undesirable
vibration and noise and can cause engine damage. The two Knock Sensors
(KS) are installed inside the V-valley of the cylinder block and sense
engine knocking.
When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element.
When knocking occurs, the sensor produces voltage signal and
the ECM retards the ignition timing. 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.

Other information:
You should exercise the utmost care
to prevent damage to your vehicle
and injury to yourself whenever performing
any maintenance or inspection
procedures.
We recommend you have your vehicle
maintained and repaired by an
authorized HYUNDAI dealer. An
authorized HYUNDAI dealer meets
H ...
Replacement
1.
Completely drain ATF.
2.
Remove the valve body cover (A).
3.
Oil filter is integral with the valve body cover, so replace the valve body cover.
The oil filter (A) is non-exchangeable because it is integral with the valve body.
4.
Fill the oil ...