Hyunday Sonata interior 12V outlets

It is possible that the issue with the rear power outlet not working on your 2016 Hyundai Sonata is due to a problem with the power outlet relay in the engine fuse box compartment. You should inspect the relay and see if it has any visible damage or if it is loose. If it is damaged or loose, you should replace it. If the relay looks fine, you can check for any other fuses in the engine fuse box that may control the rear power outlet. If you are not familiar with electrical systems, it is recommended that you take your vehicle to a qualified technician for further diagnosis and repair.

This fuse box diagram show a power outlet fuse in the inside fuse box. It also shows two fuses and a relay in the engine compartment fuse box.
https://www.autogenius.info/hyundai-sonata-hybrid-2017-fuse-box-diagram/
The relay says for 3 power outlets
One of the fuses says for cigarette lighter
If all the fuses are good the outlet which does not work may have shorted and blew the fuse. Check outlet to see if it has power to it.

the imobilizer need reset if stil the original you need to take the car to hyunday dealler to reset

http://www.jcwhitney.com/2006-2010-hyundai-sonata/timing-belt-tensioner/p2024960d1081y2006-2010j1.jcwx

Check fusses for power outlets might be more then power out lets on same fuse check owners manual

That sounds like a possible blown fuse, have a look in your manual to identify the fuse that supplies current to those circuits

I need one new hazard switch for my hyunday sonata 1998 4cilinder

Shud be same,look if fuse box has others incase,M

First probe the center contact in the power outlet with 12V test and confirm power or not. ( check with ign on since some outlets might only have power with the key or engine on ) If no power and all other interior items operate, remove outlet and check connection. It might not have ever been connected since being built. It happens .

If you know anyone that has a portable booster, you should be able to plug the cord from the 12v outlet on the booster into the 12v (cigarette lighter or accessory charger) in the car, and get enough power to pop the trunk.