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Discussion Starter · #1 ·
2018 gt sport with tech pack here...just passed 65k mile mark and upon startup this morning...the dreaded check engine light.

Car seems to drive fine and I have regularly fed it premium(or at least midgrade octane rating fuel) until just a few wks ago (gas prices here in CA has been nuts lately).

I'm a teacher and I will not be able to get to the dealership until about two wks later. Anyone else have a check engine light come on, in their gt sport or n-line? What are some possible causes? Emissions? Faulty O2 sensor?

Thanks in advance for your input and hope you all have a safe wknd.

-Peter
1921
1922
 

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2019 GT N-Line; Fiery Red 6MT
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It could be a number of things.
Most common code is the EVAP system, which is usually no big deal. But it could also be something more serious

I would try to find someone with a scanner to pull up the code to confirm. You can also buy cheap bluetooth OBDII readers and use the 'torque' app as a cheap alternative.
 

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2019 Elantra GT N-Line w/Tech package
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Thank you. Will try to get a scanner this wk. 👍
Some auto parts stores will even do the scan for you for free (they hope you'll buy the parts from them).
It can be worth seeing if an AutoZone will do that for you.
As said before, it could just be the evap system (loose gas cap). But there's a lot of other things that are "you can wait a week, but it's important", or "you shouldn't wait at all". Best to do that scan and make sure.
 

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Discussion Starter · #5 ·
Did not know this! Thank you for the suggestion. I have a friend who has a scanner(but lived about an hr away). I think I will pay him a visit with a six pack of beers after work, this week. :)
 

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Discussion Starter · #6 ·
Guys...weird stuff. After I put some premium fuel into the car at start of the week...after about 4 days of the check engine light on, it suddenly went away. Very confused lol😅...
 

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2019 GT N-Line; Fiery Red 6MT
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Probably just an evap code! The car should store old error codes in the ECU so you could pull them up even with the engine light gone.
 

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Discussion Starter · #8 ·
Probably just an evap code! The car should store old error codes in the ECU so you could pull them up even with the engine light gone.
If that's the case, thank goodness lol...did not want to deal with the stealership over the wknd 😅
Will still check with a my friend's code scanner soon, just to be sure, though👍.
Thanks!
 

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FYI you can buy an obd2 scanner for about $25 on ebay and the torque pro app is $5. So all in for $30 you can pull your own codes and Google them.
 
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