
In order for the FCA system to operate properly, always make sure the camera is clean and free of dirt, snow, and debris.
Dirt, snow, or foreign substances on the sensor cover or sensor may adversely affect the sensing performance of the sensor.
NOTICE
Information
Have the system checked by an authorized HYUNDAI dealer when:
Warning message and warning light

Forward Collision Avoidance Assist (FCA) system disabled. Camera obscured
When the front camera is blocked with dirt, snow, or debris, the FCA system operation not be able to detect other vehicles. If this occurs, a warning message will appear on the LCD display. The system will operate normally when such dirt, snow or debris is removed.
FCA may not properly operate in an area (e.g. open terrain) where any objects or vehicles are not detected after turning on the engine.
FCA Warning Message and Brake Control
System MalfunctionHyundai Elantra AD (2016-2020) Service Manual: Troubleshooting
Troubleshooting
SymptionSuspect areaRemedyEngine misfire with abnormal internal lower engine noises
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Worn crankshaft bearings
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Loose or out of specification engine flywheel
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Replace the crankshaft and bearings as required.
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Repair or replace the flywheel as req ...
Hyundai Elantra AD (2016-2020) Service Manual: TPMS Sensor Repair procedures
Removal
1.
Remove the valve core and deflate the tire.
2.
Remove the side of the tire bead area from the wheel using tire changing machine .
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The tire bead should be broken approx. 90° from the valve side of the wheel. The bead breaker should not be set too deep ...