Hyundai Ioniq: Evaporative Emission Control System / Fuel Filler Cap. Description and operation
A ratchet tightening device on the threaded fuel filler cap reduces the chances of incorrect installation, which seals the fuel filler. After the gasket on the fuel filler cap and the filler neck flange contact each other, the ratchet produces a loud clicking noise indicating the seal has been set.

Replacement1.Turn ignition switch OFF and disconnect the negative (-) battery cable.2.Remove the filler-neck assembly(Refer to Engine Control/Fuel System - "Filler-Neck Assembly")3...
Other information:
Special Service Tools
Item
Illustration
Application
Fuel Pressure Gauge(09353-24100)Measuring the fuel line pressureFuel Pressure Gauge Adapter(09353-02100)Connection between the high pressure fuel pump and the fuel feed lineHeated Oxygen Sensor Socket Wrench(09392-1Y100)Removal and installation of the heated oxygen sensor※ SST No...
Check Driver Attention Warning (DAW) system
When the warning message appears, the system is not working properly. In this
case, have the vehicle inspected by an authorized HYUNDAI dealer.
WARNING
The Driver Attention Warning (DAW) system is not a substitute for safe
driving practices, but a convenience function only...
Categories
Seat belt warning light

As a reminder to the driver, the seat belt warning light will illuminate and
warning chime will sound for approximately 6 seconds each time you place the Engine
Start/Stop button to the ON position if the seat belt is unfastened.
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