Sedan, hybrid, FWD/Front-Wheel Drive, built in South Korea. Owner complaints on file from Dec 20, 2019 to Sep 25, 2026.
Owner complaints about this model year, by the year they were filed with NHTSA.
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5 complaints on file, page 1 of 1.
am writing regarding 43099808 Number with Hyundai My 2019 Sonata hybird se in limp mode with an active flashing P1326 knock sensor code. The dealership is using an automated system denial to try and charge me $2,110 for an EGR valve and air filter.I am officially challenging this diagnostic path. Mathematically and mechanically, an EGR valve or MAF sensor cannot generate the structural rod-bearing acoustic frequency required to trip a manufacturer-specific P1326 engine protection code.Furthermore, the tracy Hyundai certified my vehicle's warranty compliance and replaced my knock sensors under the KSDS campaign only two weeks ago. The fact that the P1326 code flashed again 14 days later proves the new sensor is successfully detecting an internal structural engine failure. I am requesting an immediate manual override and a field review by the District Parts and Service Manager (DPSM) for a full engine replacement under the terms of the lifetime class-action warranty.
NHTSA complaint 11766963The primary failure is in the Engine/Powertrain system and Knock Sensor Detection System (KSDS), causing 6 identical sudden engine stalls (OBD-II code P1326) from 09/2000 to 06/2026. Additionally, severe excessive oil consumption was documented during 2 of these diagnostic visits, showing deep-seated engine issues. The vehicle and all records are available for inspection at the Hyundai dealer. Safety was severely threatened on 6 occasions. The vehicle abruptly stalled at 60+ mph in active highway traffic, forcing an immediate engine shutdown. This left me with highly impaired steering and braking control in fast-moving traffic, creating an imminent risk of high-speed rear-end collisions and jeopardizing my life and others. The primary stalling defect and P1326 code were confirmed 6 separate times by the authorized Hyundai dealership. The secondary excessive oil consumption issue was also formally confirmed by the dealer during 2 of those visits. Despite multiple dealership-confirmed diagnoses, no permanent repair has been achieved. The vehicle has been inspected during all 6 visits by dealership technicians. For the current (6th) visit, the dealer could not resolve the recurring defect and formally contacted Hyundai Corporate Technical Support for expert analysis, which is currently ongoing. Except for the first visit, the pattern is identical: the car stalls, the dealer clears codes/replaces KSDS, and it stalls again within 3 weeks. Notably, during the 4th visit, they replaced the Intake Manifold. Now, on this 6th visit, they demand I pay to replace that same part again. This proves they cannot diagnose the root engine failure and are only applying useless, temporary fixes. Prior to all 6 stalls, the flashing Check Engine / Hybrid Warning light triggered on the dashboard. This critical KSDS alert was followed within seconds by a total loss of motive power. Also, a history of rapid engine oil depletion and low-oil alerts was documented in 2 of the diagnostics.
NHTSA complaint 11750679Purchased 2019 after 44,000 miles engine was replaced metal in engine and inverter coolant issue July 2025 117,000 my inverter coolant light came in and off several times then car through all warning lights hev check engine warning shut it down went into limp mode Towed to dealership they checked and cleared codes said it threw 13 codes but after clearing they stated nothing wrong with it As they went to pull car around it happened again this time code was knock sensor which they relaxed at no charge extended warranty They next day after picking up while at idle hev warning went in shut car off and it was gone kept driving nonissues The next day again it happened and this time the engine light stayed on Spoke with dealership they said they would charge me diagnosis charge of 208 and if it was related to what they did. It would be covered also stated if the engine light was flashing it would be covered or it isn’t the engine isn’t covered The inverter coolant is not bubbling or moving when car is on it is an inverter coolant issue that was a problem back when my first engine was repaired and should be covered I love my vehicle but I have had so many issues since getting it major things and the lighting system showing a black spot in my view as well that could not be fixed I will attach pictures of earning lights and video of coolant not circulating and the dealership filled the coolant way over the top I have to now take it back again to have it looked at
NHTSA complaint 11674772When accelerating, the vehicle automatically hesitates and loses power. This happens when pulling out from complete stops as well as moving slowly to passing other vehicles. The tachometer still shows power but the brakes depress and there is no power to the vehicle and it hesitates feeling as if the ABS are kicking in. In order for it to resolve itself you have to let it run its course. The service departments at the dealer have felt it but can’t pinpoint an answer.
NHTSA complaint 11451450TL* THE CONTACT OWNED A 2019 HYUNDAI SONATA. WHILE THE CONTACT WAS PULLING INTO AN INTERSECTION, A SECOND VEHICLE CRASHED INTO THE FRONT DRIVER SIDE OF HIS VEHICLE. THE FRONT END OF THE VEHICLE WAS SEVERELY DAMAGED; HOWEVER, THE AIR BAGS DID NOT DEPLOY. THE DRIVER SUSTAINED BROKEN RIBS, AND INJURIES TO THE LEG, HEAD, AND ARM. MEDICAL ATTENTION WAS RECEIVED AND POLICE REPORT NUMBER: [XXX] WAS FILED. THE VEHICLE WAS DESTROYED AND TOWED FROM THE SCENE. BROADWAY AUTOMOTIVE (1010 S. MILITARY AVE, GREEN BAY, WI) AND THE MANUFACTURER WERE NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 3,500. *DT ('PARTS OF THIS DOCUMENT HAVE BEEN REDACTED TO PROTECT PERSONALLY IDENTIFIABLE INFORMATION PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).')*JB
NHTSA complaint 11290285Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall; the 60 most recent are listed.