Where is speed senor on a Hyundai Sonatas

This is indeed a serious problem and was covered in a Service Bulletin. Your dealership should be doing it for free but not sure if it is a recall. It is a big job as shown here.

https://static.nhtsa.gov/odi/tsbs/2020/MC-10173548-0001.pdf

https://www.google.com/search?q=Hyundai+Sonata+P0717

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Either very low power from the battery, or mechanical issues with the engine (frozen up?)

Main Power Harness Goes from Battery to Alt and PDC

I wouldnt think so, but then again I am not a mechanic so I cant guarantee anything but it seems very unlikley.

computer or ignition module at fault

have you depressed the clutch pedel sonatas have an interlock that prevent starting until the clutch pedel is pressed in if this does not fix the problem and the battery is fully charged trace the wiring from the clutch pedel to confirm its not brocken

nearly all taxis in china are sonatas,so although they do have some problems.they are a good bye.just remember JD POWER put hyundai higher than mercedes for reliablity

Your alternator bearing can make that noise when it is going bad. Open the hood and find the alternator. Search on the internet to see what it looks like. That is easier than trying to explain it. Take a metal rod or a 3/8" drive 12" to 18" extension and with the engine running, carefully place one end of the rod on the alternator case and the other to your ear. BE VERY CAREFUL TO NOT TOUCH ANY ELECTRICAL CONNECTIONS OR MOVING PARTS. IF YOU DO'T FEEL COMFORTABLE DOING THIS, TAKE THE CAR TO A CERTIFIED MECHANIC. You can check the water pump with this same technic which could be making the sound but I would bet it's the alternator. Replacement is how to fix it.

Yes, IF you are the first owner. Everyone else gets 5 years or 60,000 miles.

speed senor