thomasschubert8
Grandeur rough engine and check engine light
Summary of the thread
A 2023 Hyundai Grandeur owner is experiencing a rough engine, a persistent check engine light, and jerking during acceleration, with a suspected issue related to the fuel injectors. Another owner with similar symptoms found that a defective injector was the cause, which required professional replacement. It is suggested to have the vehicle checked by a professional to confirm the issue and proceed with necessary repairs.
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4 comment(s)
thomasschubert8 (community.author)
Yeah, it does seem a bit rougher when it's cold. What ended up being the problem with yours?
ellakaiser1
Turns out, my symptoms were also from a defective injector. I tried a fuel pump cleaner, but it didn't help, so I ended up taking it to a workshop. They confirmed it was a bad injector and swapped it out. Cost me 515€ including labor. If you're experiencing the same it's probably best to get it checked by a professional.
thomasschubert8 (community.author)
Thanks for the info! Appreciate you sharing your experience. I'll get it to the shop.
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HYUNDAI
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GRANDEUR
ellakaiser1
Oh, that sounds frustrating! I drive a Grandeur too, and I had similar symptoms a while back. Rough idle, check engine light, the whole shebang. Did you notice if it was worse when the engine was cold?