Hyundai Veloster misfire problems

Filed Oct 19, 2026 · Engine · NJ

Vehicle was checked for Hyundai recall 203 in 2022. Engine suffered a catastrophic failure in March of 2024 at around 94,000 miles due to the improperly heat treated piston rings referenced in Hyundai recall 203. Dealership only replaced the short block after suffering an attempted thrown rod, resulting in debris left in the engine. A teardown of the engine was required this year to unstick the OCV 2 Valve which should have been replaced with a Long Block replacement after the catastrophic rod failure. No check engine light or oil pressure light appeared before the original catastrophic failure. Technician report confirmed there was no oil sludge sticking the valve. About 2 weeks ago I had received a P0016 and eventually a P0171 code. During this time I had a rough idle and my car would constantly try to pull itself forwards when braking or idling due to the engine constantly pulling more air and fuel through then it should. Doing my due diligence I replaced my 2 VVT Solenoids and a PCV Valve on my own before ultimately needing to bring it in.

Filed Sep 14, 2026 · Electrical, Engine · OK

The engine/engine management system malfunctioned. The vehicle began repeatedly stalling and shutting off while I was driving and while stopped in traffic. The vehicle is now no longer able to start and run and will need to be towed to a Hyundai dealer. The vehicle is available for inspection upon request. My safety and the safety of others were put at risk because the engine shut off unexpectedly in active traffic. When the engine stalled, I lost the ability to continue accelerating and had to put the vehicle in Park and restart it. This occurred more than once and could have caused a collision, especially in intersections or congested traffic. An independent diagnostic scan was performed and showed engine misfire faults, although it did not identify a specific cylinder. The vehicle has not yet been fully inspected by Hyundai because it is currently inoperable and needs to be towed to the dealer. Hyundai has confirmed that there is an active software/campaign update associated with my VIN. I am also aware of Hyundai engine-related campaigns involving certain 2019–2021 Veloster vehicles with the 2.0L Nu engine, and my vehicle is experiencing similar symptoms, including stalling and engine shutdown. I am requesting that the vehicle be inspected by Hyundai to determine the cause. Prior to the complete no-start condition, the vehicle had symptoms including rough running, misfiring, stalling at stops, and the engine shutting off while driving. A diagnostic test confirmed misfire faults. The condition progressively worsened until the vehicle would no longer start and remain running

Filed Jun 8, 2026 · Engine · TN

2016 Hyundai Veloster with 1.6L Gamma engine experienced repeat catastrophic engine failure consistent with the federal safety agency Recall 20V746000 / Hyundai Recall 198 for connecting rod bearing failure. Failure #1: At 124,036 miles, engine developed loud knocking noise increasing with RPM, check engine light, and DTCs P0300 (random misfire) + P0303 (cylinder 3 misfire). Dealer repair order documented "broken intake valve on cylinder 3." Engine was replaced at my expense because Hyundai stated VIN was not covered under Recall 198, despite failure mode matching the recall. Failure #2: Hyundai replacement engine failed at 164,410 miles (40,374 miles on replacement engine). Identical symptoms returned: loud metallic knock that increases with RPM, same DTCs P0300/P0303, misfire cylinder 3. Vehicle is currently inoperable. Safety Concern: the federal safety agency Recall 20V746 states connecting rod bearings "may wear prematurely, which over time can result in engine damage" and "can increase the risk of a fire." Both of my engines suffered catastrophic internal damage at ∼40k-50k mile intervals with identical codes and cylinder 3 failure. A broken intake valve is engine damage directly caused by bearing wear allowing piston-to-valve contact. This is a pattern defect. My VIN was excluded from the recall, yet suffered the exact failure twice. The replacement engine supplied by Hyundai had the same defect. This presents a safety risk of sudden engine stall, loss of power, or fire while driving. Requested Action: Investigation into why VINs experiencing the exact failure mode are excluded from Recall 20V746, and assistance obtaining remedy from Hyundai.

Filed Apr 11, 2026 · Electrical, Engine · OK · crash · 1 injury

Incident Description: I purchased a 2016 Hyundai Veloster (VIN: KMHTC6ADXGU255844) in May 2025. Shortly after purchase, the vehicle began exhibiting serious mechanical issues, including engine knocking, excessive oil consumption, stalling, misfiring, and loss of power. Despite these ongoing issues, the vehicle is listed as having Recall 198 completed. However, the symptoms associated with that recall continued and progressively worsened. The vehicle ultimately stalled in traffic while I was making a turn, resulting in an accident. In a separate incident, after exiting the vehicle and believing it to be in PARK, the vehicle moved unexpectedly and ran over me, causing serious physical injuries including fractures. Prior to these incidents, the vehicle had ongoing mechanical issues that were not properly resolved. The vehicle also required repeated jump-starts and became unreliable to operate. Additionally, there are discrepancies in the service records. The vehicle was towed to a dealership on or about June 8, 2025 and remained there until approximately July 15, 2025. However, the documentation provided reflects only a limited number of service days and consolidates multiple visits into a single summary. Due to these inconsistencies and the continued presence of failure symptoms, I am unable to verify that recall-related repairs were properly performed. These incidents raise serious concerns about engine failure and possible unintended vehicle movement, both of which present significant safety risks.

Filed Oct 18, 2025 · Engine · GA

My spark plugs misfired

Filed Apr 29, 2025 · Engine · WI

I was driving my vehicle and it began severely misfiring and stalled on me. I took it to the dealer and found there was damage to cylinder number 2 engine balance. After research I found there are many claims and complaints due to this type of issue. The likely cause is preignition caused by what Hyundai calls bad software. I recently purchase the vehicle and they say it was updated in July of 2024 and will not repair my vehicle as they say because of its age and mileage. That being said I’m at 120k mileage and work in the auto industry…. They is nothing that could cause valve burn outside of the known ignition issue with these cars. I have no problem paying for repairs due to my cause issues or normal wear and tear but a melted valve is caused by the know issues on these cars. I am looking for help working with Hyundai to get this issue fixed.

Filed Sep 16, 2024 · Engine · FL

A connecting rod bearing failed in the engine leading to catastrophic engine failure with the connecting rod breaking through the wall of the engine block causing a hole and undriveable vehicle. According to my research, this issue has been recalled in adjacent model years (2015-2016) but not in my model year (2013) that has the same engine. This issue has already been confirmed in these engines, but Hyundai states my car is not included in the recall. This was a safety risk because the engine failure breached the engine wall which could have ignited engine oil and caused a fire. The engine may have also failed at a critical driving moment when acceleration was needed and stranded the car in an unsafe position. Yes, the problem was reproduced at the dealer's service center because the failure occurred while they were test driving my vehicle. Since the service center tech was the one driving the car when the incident occured, I do not know if there was a fire or not and the speed they were traveling, etc. The vehicle has been inspected by the dealer service center and confirmed that this is the issue that caused the problem. The dealer even suspected this was going to happen as they had foreknowledge of the issue occurring on other vehicles that had already been recalled for this issue. The only prior warning of this issue is that I had some misfires on the engine a few days before which is what prompted me to bring it in for service. The misfires temporarily illuminated the "check engine" light but then the light went back out again. I had no idea this minor issue would result in such a severe, catastrophic failure.

Filed Jun 8, 2024 · Electrical, Engine · FL

Vehicle is burning through oil without having oil light engaged. Vehicle is going through two quart + of oil every 3 weeks. Just added 2 quarts of oil 3 weeks ago when the car would not accelerate past 5mph and rough idled (this turned out to be caused by a different issue still being diagnosed), I added the oil as dip stick showed no oil on the stick. Light did not come on. Took to independent mechanic this week who stated I had no oil in the vehicle. Can not go 3 month/3000 miles for an oil change or the engine would be damaged. Have taken the vehicle several times to Valvoline who indicate no oil with no oil pressure light on, each time. This has been constant for 2 years. Each mechanic shop states the GDI engines are burning through oil. No oil leaks have been detected. This issue could result in serious engine damage.

Filed Mar 4, 2024 · Engine · FM

There is a recall for 2016 Velosters that is for the engine rods failing. The 2015 to 2016 Hyundai Veloster has been recalled for connecting-rod bearings in the engine that could wear out prematurely and damage the engine1. The 2016 Hyundai Veloster has had several engine-related issues, including excessive oil consumption, going into limp mode, hesitating at acceleration, knocking sound in the engine, poor acceleration, stalling, failure in the timing chain tensioner, rough idling, and oil leaks. Which is exactly what is happening to my car currently. Told me I was not eligible. But I'm not understanding why.

Filed Nov 22, 2023 · Brakes, Engine · 98,000 miles · FL

The contact's daughter owns a 2012 Hyundai Veloster. The contact stated that the check engine warning light was illuminated. Additionally, the contact stated that while accelerating from a complete stop, the vehicle jerked, lurched forward, and there was smoke coming out of the exhaust pipe. The contact stated that the failure also occurred while driving at various speeds. The contact stated that on several occasions, the vehicle failed to respond upon depressing the accelerator pedal. The contact stated that her daughter would pull to the side of the roadway for a moment, then would continue driving; however, the failure persisted. The vehicle was taken to an independent mechanic, where the motor mounts, the spark plugs, camshaft sensor, and the fuel injectors were replaced; however, the failure recurred. Additionally, the contact stated that the vehicle was experiencing abnormal oil consumption. The contact stated that she noticed a puddle of oil underneath the vehicle while the vehicle was parked, on several occasions. The vehicle was inspected by several independent mechanics; however, the source of the oil leak could not be determined. An independent mechanic replaced the catalytic converter; however, the failure recurred. The MIL warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed that the engine was misfiring and was experiencing an internal failure. The dealer informed the contact that the engine needed to be taken apart for further diagnostic testing and was charged a fee. The vehicle was not repaired. Additionally, the contact received notification of the federal safety agency Campaign Number: 23V652000 (Service Brakes, Hydraulic); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 98,000. VIN tool confirms parts not available.