2012 Hyundai Sonata only one 12v power outlet working how to fix the other outlet?

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.

If the oil loss started after oil change check to see if your oil filter is not all the way tight. My oil light came on a couple months ago about a month after oil change. I reached under my truck and could turn the oil filter by hand. Just something to check. Make sure the oil filter is tight and drain plug is not wet may leak at drain plug. Those are the cheep fixes.
https://forums.edmunds.com/discussion/50518/hyundai/sonata/oil-consumption-replace-your-pcv-valve

https://www.hyundai-forums.com/threads/2012-sonata-using-1-2-3-4-quart-oil-weekly-help.646107/

https://www.hyundai-forums.com/threads/11-sonata-using-oil.407386/

https://topclassactions.com/lawsuit-settlements/lawsuit-news/55863-class-action-hyundai-failed-disclose-sonata-engine-defect/

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.

Hyundai Sonata Questions - My Hyundai Sonata won't start ...

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CarGurusMar 5, 2013 - My Hyundai Sonata won't start, everything comes on when the key is turned but no ... it is in park and until I jiggle the shift until the light does come on it will not start. Was in ... My 2009 Sonata has been "perfect" with no issues.

2009 Hyundai Sonata turns over but will not start ... - CarGurus

www.cargurus.com > Questions > Hyundai > Sonata

CarGurusJun 16, 2013 - 2009 Hyundai Sonata turns over but will not start, sometimes. - 70000 kms.

Car wont start? - Hyundai Forums : Hyundai Forum

www.hyundai-forums.com/nf-2006...sonata/139435-car-wont-start.html

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code p0191efers to fuel rail pressure (FRP) sensor--range /performance problem===causes wiring--- FRP sensor . Check the voltage at the sensor and if correct then replace the sensor.

there is usually a fuse for them under acc find it in the fuse block I am not sure where this one is but that is most likely your problem

here you go:

http://s3.amazonaws.com/carmanuals/hyundai/2012/2012+Hyundai+Sonata+OM.pdf

It seems someone have solved your question, I have the same problems with my 12V Led Fog Lights before. And I do the almost same suggestion as Laurenx's, hah!

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

I pulled the trunk 12V socket outta the wall and ran a wire straight to the battery terminal, so now its powered all the time (thru a 15AMP fuse)