2021 Hyundai Kona: check engine light

Filed Oct 5, 2026 · Engine, Fuel system · AZ

All 4 fuel injectors failed. They were replaced but the check engine light came back on. Crank shaft sensor was then replaced and now the check engine light is back on. Driving the car waiting for something to fail is not safe

Filed Jun 27, 2026 · Engine, Transmission · NE

I am writing to express my frustration and concern regarding my 2021 Hyundai Kona, which currently has only 88,754 miles. My vehicle has been experiencing excessive oil consumption along with an ongoing check engine light. The diagnostic trouble codes are P0017 and P0011. In an effort to resolve the issue, I have had both the intake and exhaust VVT components replaced and the oil changed. When the problem persisted, my mechanic advised that Hyundai OEM parts were required. I then spent approximately $700 replacing the components with OEM parts, yet the check engine light remains on and the same issues continue. At fewer than 89,000 miles, I do not believe these are problems that should be occurring on a properly maintained vehicle. I have already invested significant money trying to repair what appears to be a larger issue, and I am left with a vehicle that is still not functioning correctly. I am requesting that Hyundai investigate this matter and provide assistance in diagnosing and repairing the underlying cause. Given the known concerns regarding excessive oil consumption and timing-related issues reported by other Hyundai owners, I believe this situation warrants Hyundai's attention and consideration for goodwill assistance. I would appreciate a prompt response outlining what steps Hyundai is willing to take to help resolve this issue. I have been a Hyundai owner in good faith, and I am disappointed that after spending hundreds of dollars on recommended repairs, my vehicle remains unresolved.

Filed Apr 2, 2026 · Engine · MT

Engine is consuming oil and developed piston slap, per the mechanic I took it to. Currently it sounds like there is gravel inside the engine and it does not seem safe to drive. The Malfunction Indicator Lamp has also come on, the codes were cleared by my mechanic but they told me it likely will return. The piston slap developed a week ago today (Thursday), the MIL started flashing 3 days later (Sunday), mechanic did the oil change on Tuesday and noted the Piston Slap at that time. All symptoms point to the issues noted in #21V‑301, but my VIN is not included in that recall per the federal safety agency website.

Filed Apr 2, 2026 · Engine · UT

VIN: [XXX] 2021 Hyundai Kona experienced sudden engine failure at approximately 103,000 miles. The engine began knocking without any prior warning, and the check engine light came on at the same time the knocking started. The vehicle was not driven for an extended period after the issue began. There were no earlier warning indicators or drivability issues that would suggest neglect or lack of maintenance. The failure was immediate and unexpected. This vehicle had previously received Hyundai recall T8Y, which involved an ECU update related to engine monitoring and performance. Despite this manufacturer intervention, the engine still experienced sudden failure. Hyundai has denied warranty and goodwill coverage for this failure. This appears to be a premature engine failure and raises concerns about reliability and safety due to the sudden nature of the issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 9, 2026 · Engine · 121,334 miles · GA

The contact owns a 2021 Hyundai Kona. The contact stated that while attempting to accelerate from a stop and while driving at various speeds, the vehicle stalled unexpectedly. The vehicle was coasted to the side of the road, and the vehicle was turned off and restarted, and continued driving. The check engine warning light was illuminated. The vehicle was taken to Auto Zone, where it was determined that the spark plugs had failed and needed to be replaced. The spark plugs were replaced; however, the check engine warning light remained illuminated, and the vehicle stalled. The failure had occurred three times; however, the last time, the vehicle failed to restart, and there was smoke coming from underneath the hood. The vehicle was towed to the dealer to be diagnosed. The contact was informed that the turbocharger and the piston rings had failed, and the engine needed to be replaced. The vehicle was not repaired. The vehicle was towed back to the residence. The contact became aware of the federal safety agency Campaign Number: 21V301000 (Engine); however, the VIN was not included. The manufacturer was not informed of the failure. The failure mileage was 121,334

Filed Feb 26, 2026 · Engine · GA

Was driving when the car seemed to lose power and would not accelerate and started shaking. Check engine light came on and got it read, the code indicated a misfire and other errors. There was no one local to fix it as we were out of town. So we replaced the plugs that were indicated and noticed how badly damaged they were. Vehicle started to drive better before stalling out again and replacing the rest of the plugs. Was able to get it home and seemed to be driving normally but then we noticed it has an oil leak now. We have to keep a religious check on the oil because of the amount leaking and the fact the car isn't giving us a low oil warning. We took it to the dealership and they said we needed a new engine and it was just outside the power train warranty. All of this occurred our 78,000-80,000 mile mark. The dealer would not even change the oil before of how bad the leak was. This car was for our teenage daughter and its not safe for anyone to drive. I believe the dealership knew this car had issues, we bought it pre-owned and have only had it 6 months.

Filed Feb 7, 2026 · Engine · MI

Known problem of oil consumption . 1 week used 3 quarts . Wife driving down road oil light. Engine light seconds later engine seized at 55mph.lucky to drift off road.

Filed Jan 1, 2026 · Engine · NJ

-The engine and related crankshaft components failed. The vehicle experienced complete engine shutdown while driving and later multiple no-start conditions. The vehicle has been inspected and repaired multiple times by an authorized Hyundai dealership and remains available for inspection upon request. -The engine shut down unexpectedly while driving at highway speed, resulting in loss of power and the need to coast and pull over. This created a risk of rear-end collision and loss of control in traffic. Subsequent failures left the vehicle unable to start, creating risk of stranding in unsafe locations. -Yes. The authorized Hyundai dealership confirmed engine-related and crankshaft-related issues and performed repairs on multiple occasions. Despite these repairs, the problem has recurred. -The vehicle has been inspected and repaired multiple times by an authorized Hyundai dealership. -Yes. The check engine light illuminated prior to multiple failures. In at least one instance, the dealership stated the light was a history code and no active issue was found. Within days, the vehicle experienced another complete failure and became inoperable.

Filed Sep 19, 2025 · Engine · PA

About a month after purchasing my car it shut down on the highway while driving. It completely lost power so I could not accelerate or even press the brake. Only the emergency brake stopped me from going into other cars. I started the car up again and then it worked fine until about another month later it happened again. I was on an exit ramp on the highway and it lost power. Cars had to quickly go around me as I had no control of my vehicle. Neither brakes or gas pedal worked at the time and my check engine light stayed on. I then took my car to Hyundai service where they told me my car went through 2 quarts of oil in one month. They want me to drive this car another 1,000 miles knowing it’s dangerous, unsafe, a risk to me and other drivers and a fire hazard to have an engine consuming this much oil. I fear to drive this unpredictable car any more. The manager of Hyundai knows it’s unfair but must follow protocol. I just don’t understand how they can tell someone to drive a stalling car waiting for an accident to happen.

Filed Mar 31, 2025 · Engine · 87,845 miles · VA

The contact owns a 2021 Hyundai Kona. The contact stated while driving 70 MPH, the vehicle started shaking abnormally and failed to idle properly. The vehicle lost power with the check engine warning light illuminated. The vehicle was then steered to the side of the road where the vehicle then stalled. The vehicle was restarted after several attempts, and the oil warning light illuminated. The vehicle then stalled again. The vehicle was towed to an independent mechanic, where it was diagnosed and determined that there was no oil in the engine. The contact stated that an oil change was performed. The manufacturer was notified of the failure. The failure mileage was 87,845.

Filed Jan 28, 2025 · Engine · MA

2021 Hyundai Kona check engine light came on while driving, within 10 minutes oil light and battery light came on and at the same time these lights came on the car stopped working. The engine stalled, leaving the car stuck in the middle of the road. The car turned off, and would not turn back on properly. The car had to be towed to a mechanic where it was discovered that the engine had no oil in it and no longer starts or runs. The car was not yet due for an oil change, there were no oil leaks found, and it seems like the engine burned the oil faster than it should have. The car was functioning properly up until the day of the event, with no issues or warning signs present. There is a recall associated with this model and year relating to engine damage, with the campaign number 21V301000, but there is no recall for this car's VIN. The car stopped driving in the middle of the road which could have easily caused a crash and now the engine needs to be completely replaced.

Filed Oct 18, 2024 · Transmission · 96,000 miles · OH

The contact owns a 2021 Hyundai Kona. The contact stated that while driving at an undisclosed speed, the vehicle downshifted unintendedly. The check engine warning light illuminated. The vehicle was able to restart; however, the failure recurred while driving. The vehicle was taken to an independent mechanic, where it was diagnosed that the transmission piston ring had failed. The mechanic determined that the transmission needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 96,000.