Hyundai Sonata: Engine Control System / Knock Sensor (KS) Description and Operation
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.

Inspection
1.
Check the signal waveform of the CMPS and CKPS using the GDS.
Specification: Refer to “Wave Form”
Removal
•
DON’T remove the camshaft pos ...
Specification
ItemSpecificationResistance(M?)4.87
...
Other information:
Hyundai Sonata LF 2014-2019 Service Manual: Oil Pan Repair procedures
Removal
1.
Remove the under covers.
2.
Drain engine oil.
3.
Using the SST (09215-3C000) and remove the oil pan.
•
Insert the SST between the oil pan and the ladder frame by tapping it with a plastic hammer in the direction of arrow.
•
After tapping th ...
Hyundai Sonata LF 2014-2019 Owners Manual: Engine Oil
Checking the Engine Oil Level
1. Follow all of the oil manufacturer’s precautions.
2. Be sure the vehicle is on level ground in P (Park) with the parking brake
set and the wheels blocked.
3. Turn the engine on and allow the engine to reach normal operating temperature.
4. Turn the engine off and ...