This warning light illuminates :
Hyundai Sonata LF 2014-2019 Service Manual: Spark Plug Repair procedures
Inspection
[On vehicle inspection]
1.
Accelerate the engine to about 3,000 rpm 3 times or more.
2.
Remove the spark plug.
3.
Check the spark plug visually.
If the electrode is dry, the spark plug is normal.
If the electrode is wet, check the damage and electrode gap as below.
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Hyundai Sonata LF 2014-2019 Service Manual: Rear Door Module Repair procedures
Replacement
1.
Remove the rear door window glass.
(Refer to Rear Door - "Rear Door Window Glass")
2.
Remove the rear door outside handle.
(Refer to Rear Door - "Rear Door Outside Handle")
3.
Loosen the rear door outside handle base mounting bolt (A).
4.
After loosening the mountin ...