2018 Hyundai Elantra GT: check engine light

Filed Apr 13, 2026 · Engine · NV

The vehicle is experiencing engine-related excessive oil consumption, which has led to failure of the catalytic converter and emissions system. The root issue appears to be an internal engine defect causing oil to burn during operation. Yes, the vehicle is available for inspection upon request, including the engine and catalytic converter components. The excessive oil consumption creates a risk of engine damage or sudden engine failure while driving, which could lead to loss of power in traffic. Additionally, a failing catalytic converter can cause reduced engine performance, stalling, or overheating, increasing the risk of unsafe driving conditions, especially on highways or in heavy traffic. Yes, the issue was previously reported to a dealership, including concerns about excessive oil consumption. The problem has continued and worsened over time, now resulting in a check engine light and catalytic converter-related fault codes, confirming the ongoing condition. The vehicle has been inspected by a dealership service department in the past regarding oil consumption concerns. At this time, it has not been inspected by police or insurance representatives. Further inspection by the manufacturer or authorized dealership can be conducted upon request. Yes, symptoms began with excessive oil loss requiring frequent top-offs, followed by the appearance of a check engine light. The issue was first reported approximately one year ago and has progressively worsened, ultimately resulting in catalytic converter-related fault codes and continued oil consumption.

Filed Jan 16, 2026 · Engine · PR

Engine consumes large amount of oil requiring oil refill every week, without turning on check engine and/or engine oil light. Raising the chances to cause accidents due to engine failure while driving, and requiring mechanical intervention to rebuild the engine or a total engine swap. There are over 40 other complaints about this same issue, and it needs to be addressed.

Filed Jan 14, 2026 · Engine · CO

I've contacted Hyundai to try and do a recall repair on my Hyundai Elantra GT 2018 both through a local dealership (Planet Hyundai in Golden, CO) and Hyundai corporate. The engine is stalling and knocking very bad to the point where it's no longer drivable. It's burning oil non-stop and I am constantly adding oil to it. I'm getting pushback from Hyundai saying I never fixed the recall when I was actually not notified to begin with. I'm the 2nd owner of the car so if I was never notified, how can I be responsible for something I was never told about? Now they are saying this little sensor was supposed to help let you know there's a problem with the engine (sounds like a check engine light?). Hyundai has known about their engines being faulty for quite some time. I need this vehicle to get to and from my job as well as taking my grandson to multiple doctor's appointments each week because he has a disability (he's only [XXX] old). They need to take responsibility for this. Is there anything the federal safety agency can do? INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 13, 2026 · Engine · AZ

I purchased the car on April 7th, 2022 with roughly 115k miles on it and got a blinking CEL shortly after. The engine was listed as a recall and was swapped with 115,610 miles on it directly after the swap. During this, the Hyundai dealership representative called Hyundai's engineer department twice, trying to get this taken care of by Hyundai/paid for by them and they denied it twice, causing me to have to pay half of what the company I got the car from covered. I was told it was denied due to being the 2nd owner and for high mileage/being out of warranty because of this mileage. I submitted all repair invoices and proof of payment through the Hyundai Campaign Reimbursement Portal, got ignored for about 3 months, then when I followed up, I was denied for the same reason, approximately around September 30th, 2025. The settlement terms for these engines typically cover all subsequent owners and do not have a mileage cap for the lifetime warranty, yet I was still illegally denied. As seen, That you have already exhausted Hyundai’s internal rebuttal process without success. I would appreciate any and all help in receiving the money paid rightfully given to me due to Hyundai's non compliance on this matter, thank you very much.

Filed Oct 30, 2025 · Engine · VT

Car was being driven home when car started shaking heavily and check engine light started flashing. Car had been needing 1qt of oil every 600-800 miles, depending on drive (highway would go longer). Pulled off to the side and plugged in code reader - found that cylinder 3 misfired and catalyst system below threshold. Was able to get the car home. Towed it to Hyundai dealership the following week once they were available and they found a bad cylinder head and leaking cylinder. Assumption is the amount of oil it was using ended up backing up carbon buildup. Car has less than 100,000 miles on it and even with maintenance it needs a new engine.

Filed Jul 29, 2025 · Engine, Transmission · TN

In mid-2024, the vehicle experienced a flashing check engine light. I brought it to Murfreesboro Hyundai (TN), where they confirmed the oil was low and started an oil consumption test. A bearing clearance test (BCT) was also performed and passed. After back-and-forth over several weeks, I was told the oil consumption was within spec, but the dealership stated Hyundai would cover all necessary repairs, including a combustion chamber cleaning, under warranty. I was told this work was completed and the vehicle was returned to me. In July 2025, the exact same flashing CEL returned. I brought the car back to the same dealership, where they again found the oil was 2.5 quarts low. However, this time they claimed no previous combustion cleaning or repairs had been done, and that I would now need to pay over $1,100 out of pocket for the same cleaning that was supposedly already performed — and which they had told me would be covered under warranty. This indicates that the dealership misrepresented completed service work, failed to address a recurring defect, and is now trying to shift the financial burden to me. Hyundai’s claim that oil consumption is not “high enough” to warrant coverage is concerning, especially when the condition continues to damage the engine and cause driveability issues. This appears to be part of a broader known defect affecting Hyundai 2.0L engines. I am requesting that the federal safety agency investigate Hyundai’s handling of oil consumption, engine misfire, and warranty practices related to the 2018 Elantra GT and similar models.

Filed Jul 29, 2024 · OH

When driving the car home from the store. The car started to vibrate, and no lights came on then then I got to a stop light and the car didn't want to go when i was pushing the gas pedal tried it a few times the check engine light came on and was flashing then the car went, and the engine light went off. Got back home and an hour later went to the car and the check engine light was on and it was vibrating and making a slight ticking noise. I am not sure what is going on with it. I change the sparkplugs a few months ago and get oil changes regularly never let things go past the needed time.

Filed May 5, 2022 · Transmission · TX

On Thursday evening, 4/28/22, I noticed engine knocking, and engine died while driving. Checked oil, and there was no oil in the car. Added oil, drove car to work the following day. Still engine noise, and dying on freeway. I never had any "check engine" or "low oil" warning lights come on to aleart me of any issue. The car only has 57K miles on it. Took the car straight to the dealership, and they are saying I need a new engine since they found metalic pieces in the oil. I know therer are other Hyundai recalls and lawsuits for engine problems, but not for this year/model. Service center said they are filing the warranty paperwork with the AutoNation Gold Extended Warranty, and I should expect a call today 5/5/22 to find out the status. Not sure why they are not using the Hyundai Powertrain warranty. (2nd owner, should be 60K milkes)

Filed Mar 11, 2019 · Engine, Fuel system · 87 miles · FL

I bought a 2018 hyundai gt sport 3 months ago. Since day one car has been stalling and having a hard time starting. I was on the highway doing 75mph and the car just turned off no warning. I called the dealer in my area let them know about the starting issues and the stalling issues with the car I took it in to them few days later. They kept it for 3 days and told me sorry we do not know what to tell you. Took it home and that day the car stalled on my way home. I took the car back to the dealer and they had it for 23 days and replaced the fuel pump and the injection system and still did not work. The dealer I bought it from replaced the battery, keys starter and alternator before I bought it and they did not tell me this car was having issues. The car is back at the dealer 3/7/2019 with stalling issues and rust build up on the bottom of the car. I have a case with hyundai and they keep telling me take it to another dealer 4 dealers later and nothing.check engine light came on flashing one day but went off and no codes found. This has been going on for about 21/2 months car is out of service now for a total of 26 days now including the days its been at the current dealer.

Filed Sep 20, 2018 · Acceleration, Brakes · 800 miles · NJ

Car shut off while on the highway randomly started shaking. All lights turned on check engine,motor oil light battery light. Car shut off to the point where I couldn't accelerate. So imagine being on the highway and your car shuts off randomly while your in motion and cant accelerate to merge to the emergency lane. This happened 4 more times on my way to the dealership less then 800 miles!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!