2019 Elantra shows 11 codes over 2 days......fml

Banzaibru

Newbie
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whynot77
Car
2019 hyundai elantr
I drive a 2019 elantra that has some low flash all a** mods and more miles than Hyundai thinks it should. 2 days ago everything started going wrong. First the bank 1 lean code then tps circuit D&E then the catalyst code then manufacturer control codes?!?! Cant get past 3k-45mph at a 46% load during idle that jumps to 80 as soon as i so much as look at the pedal. ITS BARELY A YEAR OLD!!!
Uhhhhhh.....help
 
Check the basics first, earth problems are usually the cause of lots of mystery error codes. IT sounds like it's in limp home mode is it running rich or lean?

Is your air flow sensor and lambda sensor working?
 
Check the basics first, earth problems are usually the cause of lots of mystery error codes. IT sounds like it's in limp home mode is it running rich or lean?

Is your air flow sensor and lambda sensor working?
Running rich. All emissions faults on my scanner. No cat as of today. Same prob
 
Rip out the air filter and see if there is a restriction in the intake which clears up or improves without a filter. This is more for troubleshooting and don't run it for long without a filter.

Do these suffer from carbon build up? A lot of what you describe could be down to carbon build up, have you tried some BG fuel cleaner to see if that improves things a little, if it does it's worth ripping off the manifolds and cleaning out the head.
 
Sounds like a pan of overcooked spaghetti.... You have my sympathy.... However, I just had a quick look online and there is heaps of information and advice from specialists, I recommend that you spend some time reading what's out there.... A lot! If it doesn't give your problem specifically, you will certainly be much wiser about the system and you might just stumble over the issue. Sorry its not bang on subject, but I do hope it helps. Kev.
 

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