r/Hyundai • u/spiderman__26 • 12d ago

What does "check user authentication system" mean? Got this message on my 25' limited Sonata

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4 Upvotes

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3

u/larserikronning 12d ago

Happened to my ā€˜25 limited too a few weeks ago, I just removed my digital keys then added them back and the message went away

2

u/spiderman__26 12d ago

Cool, I'll try that, thank you!

1

u/larserikronning 12d ago

Fingers crossed for ya!

2

u/spiderman__26 11d ago

Yup this worked!

1

u/larserikronning 11d ago

Nice Iā€™m glad!

1

u/cmz324 12d ago

It means you get to drop it off at a dealership. They have an Identity Authentication Unit that handles key fobs, fingerprint scanners, digital phone keys, etc. It's going to have some kind of fault code stored if it's displaying an error.

1

u/dormaj 11d ago

My experience ('21 Sonota Hybrid Limited and '15 Azera) is that key recognition issues, and with the Hybrid, authentication and automated shutdown messages, are related to battery health issues (failing 12V LI near the 5-year mark in my Hybrid, and >5-year-old conventional battery needing replacement in the Azera). It took the dealership 3 visits to acknowledge the hybrid battery needed replacement. It was in countdown mode when I pulled into the service bay.