So i started driving back home from class yesterday and right when i got home, the EML light came up, i thought it was weird so i turned the car off nd back on, it disappeared, i went for a drive to see if it came back up and it didnt

This morning i got up to drive it once again, and the eml light came on, i took it to autozone to use a scanner and as soon as i turned the car off requested by the scanner, it disappeared. I checked for codes and there werent any at all
The car does enter in limp mode but can rev over 4k, slower than usual but not noticable slow, it almost acts like it doesnt even have a problem

Drove back home on a warm car, and the code didnt appear.

Note, recently the weather got colder in my area, and my car started beeping once after turning the key, i have tried to figure out why it beeps once, i think it has to do with the outside temperature since it flashes the temp on the digital screen on my tach, and then goes back to displaying mph on the screen

Also, my car has a tune, i dont know who did the tune as the guy who sold it to me bought it from someone else who did it.

Has anybody ever had this problem? I believe it could be a bad sensor, or the sensor isnt functioning properly because of the cold, but its weird because it didnt do it last winter