Check your tires, including the spare tire, once a month or more.
How to check
Use a good quality tire pressure gauge to check tire pressure. You can not tell if your tires are properly inflated simply by looking at them. Radial tires may look properly inflated when they are under-inflated.
Remove the valve cap from the tire valve stem. Press the tire gauge firmly onto the valve to get a pressure measurement. If the cold tire inflation pressure matches the recommended pressure on the tire label located on the driver's side center pillar or in this manual. No further adjustment is necessary. If the pressure is low, add air until you reach the recommended pressure. Make sure to put the valve caps back on the valve stems. Without the valve cap, dirt or moisture could get into the valve core and cause air leakage. If a valve cap is missing, install a new one as soon as possible.
If you overfill the tire, release air by pushing on the metal stem in the center of the tire valve. Recheck the tire pressure with the tire gauge. Be sure to put the valve caps back on the valve stems. Without the valve cap, dirt or moisture could get into the valve core and cause air leakage. If a valve cap is missing, install a new one as soon as possible.
A cold tire means the vehicle has been sitting for 3 hours and driven for less than 1 mile (1.6 km) in that 3 hour period.
Allow the tire to cool before measuring the inflation pressure. Always be sure the tire is cold before inflating to the recommended pressure.
Hyundai Elantra AD (2016-2020) Service Manual: Crankshaft Position Sensor (CKPS) Repair procedures
Inspection
1.
Check signal waveform of CKPS and CMPS using a scan tool.
Specification : Refer to "Waveform"
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the crankshaft position sensor connector (A) and remove the sensor af ...
Hyundai Elantra AD (2016-2020) Owners Manual: Special Driving Conditions
Hazardous Driving Conditions
When hazardous driving elements are encountered such as water, snow, ice, mud
and sand, take the below suggestions:
Drive cautiously and keep a longer braking distance.
Avoid abrupt braking or steering.
When your vehicle is stuck in snow, mud, or sand, use sec ...