You can start the engine without inserting the key.
NOTICE
To prevent damaging the smart key:
NOTICE
Always have the smart key with you when leaving the vehicle. If the smart key is left near the vehicle, the vehicle battery may be discharged.
Hyundai Sonata LF 2014-2019 Service Manual: Brake Line Repair procedures
Removal
1.
Disconnect the brake fiuid level switch connector, and remove the reservoir cap.
2.
Remove the brake fluid from the master cylinder reservior with a syringe.
Do not spill brake fluid on the vehicle, it may damage the
paint; if brake fluid does contact the ...
Hyundai Sonata LF 2014-2019 Service Manual: Injector Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the injector connector.
3.
Measure resistance between the injector terminals 1 and 2.
4.
Check that the resistance is within the specification.
Specification: Refer to “Specification”
Removal
...