This warning light illuminates:
When the fuel tank is nearly empty.
Add fuel as soon as possible.
NOTICE
- Low Fuel Level
Driving with the Low Fuel Level warning light on or with the fuel level below "E" can cause the engine to misfire and damage the catalytic converter (if equipped).
Hyundai Sonata LF 2014-2019 Service Manual: DCT Control Module (TCM) Repair procedures
Inspection
Transmission Control Module (TCM) Inspection Procedure
1.
Inspecting TCM ground circuit: Measure the resistance between the TCM and chassis ground.
(Check the terminal connected to the chassis ground while using the back of the harness connector as the base point for TCM.)
...
Hyundai Sonata LF 2014-2019 Service Manual: Power Door Mirror Switch Repair procedures
Inspection
[Power Window Module (IMS)]
1.
Disconnect the negative (-) battery terminal.
2.
Remove the front left door trim.
(Refer to Body - "Front Door Trim")
3.
Disconnect the power mirror switch connector from the door trim.
4.
Check for continuity between the terminals in each ...