My 2013 Hyundai sonata 2,4 has a problem of the 1st gear doesn't work

check fuses- relays -motor -gearing--track for damage or debris

https://www.autoserviceprofessional.com/article/93110/hyundai-trans-temp
https://static.nhtsa.gov/odi/tsbs/2014/SB-10059669-2273.pdf

https://www.hyundai-forums.com/threads/transmission-fluid-flush-and-or-sensor-replacement.537993/

https://www.hyundai-forums.com/threads/bad-transmission-fluid-temp-sensor.130014/
http://www.carproblemzoo.com/hyundai/sonata/transmission-sensor-problems.php

Can you turn the interior light on manually? My 2009 Hyundai Sonata has two switches on the interior light fixture. One is labeled 'Door', and must be depressed for the light to work with the doors. The other switch is to turn the light on/off manually.

Firing order is 1-3-4-2

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

www.cargurus.com > Questions > Hyundai > Sonata

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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Hyundai 2011 "PRESS BRAKE PEDAL TO START ENGINE ...

? 3:03
www.youtube.com/watch?v=4f4nS6BpNJY
Jul 16, 2012 - Uploaded by rdsinsandiego 2011 Hyundai Sonatas have been reported on the net by a few to have a random problem ... i have 2013 Hyundai sonata and the engine won't start when i use the key and turn on .... Had similar problem with my 2012 Elantra.

2013 Hyundai Elantra won't start - YouTube

? 0:24
www.youtube.com/watch?v=uVNMgSE0nNA
Aug 29, 2013 - Uploaded by hellogoodbye1185
It will be fine for a couple of weeks then one day just won't start. ... my 2013 hyundai elantra also would not start but all the lights and radio were working .... Hyundai 2011 "PRESS BRAKE PEDAL TO START ENGINE" problem ...

2012 Hyundai Elantra Starting Issue - YouTube

? 0:57
www.youtube.com/watch?v=pDzSgucZ1tw
Oct 10, 2012 - Uploaded by carupz421
So if your Elantra won't start, turn the key to where you can move the shift .... Having exact same problem on my 2011 elantradid you find out ...

Its most likely a worn down battery. They get even weaker when its very cold outside. I'd get a jump or connect a charger to it.

Are they trying to avoid warranty work? Go back and badger them into fixing it. Dealers can be notorious scammers. But that's just my opinion.

Water in cylinders

2013 Hyundai sonata my trunk just randomly pops open and it's not the fob key