2026 Hyundai Palisade: sudden loss of power

Filed Oct 27, 2026 · Acceleration, Transmission · VA

My vehicle suffered a complete loss of power when trying to accelerate from a low rate of speed. This has now happened twice while driving and poses a safety risk to me and my family. The problem has not been reproduced by the dealer. The vehicle has been inspected by the manufacturer. There was no warning or symptoms before the problem occured. Warning lamps appeared after the problem.

Filed Oct 24, 2026 · Electrical, Engine · ND

Our 2026 Hyundai Palisade has experienced repeated dangerous electrical failures while driving. XXX All instrument displays went completely black while driving. The engine continued running. Gateway Hyundai in Fargo, ND, checked the vehicle but verbally reported finding no diagnostic codes. XXX While driving on the highway at night, the interior displays and exterior lights repeatedly flickered off and on. XXX The vehicle unexpectedly lost power and shut down at highway speed, requiring a tow to Don Bessette Hyundai in [XXX]. The dealership documented 36 stored diagnostic trouble codes, primarily communication faults. The codes were cleared, and an ECM software update was performed. No confirmed cause was identified. XXX The instrument panel went completely black twice while driving, lasting approximately 10 minutes and 14 minutes. XXX While driving at night, the interior and exterior lights again flickered off and on. Approximately 30 minutes later, the instrument panel went black and the exterior lights dimmed. We pulled over, activated the hazard lights, and restarted the vehicle, but normal lighting did not return. We drove approximately 14 miles with hazard lights on to reach the nearest town. The lights eventually returned, but the instrument panel continued flickering, the front camera repeatedly reported being disabled, and driver-attention warnings appeared during the drive home. These failures continued after dealership service and a software update. We are concerned about another sudden loss of engine power, headlights, or critical driver information at highway speeds. These failures pose a serious safety risk to occupants and other motorists. We request that the federal safety agency investigate these electrical failures. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 2, 2026 · Electrical · 300 miles · PA

The contact owns a 2026 Hyundai Palisade. The contact stated that while at a stoplight and attempting to depress the accelerator pedal while making a left turn, the vehicle lost power. The Police showed up on the scene and were able to jumpstart the vehicle and called AAA to have the vehicle towed to the dealer. A dealer was contacted. The vehicle was towed to the dealer, where it was diagnosed and determined that the engine control module needed to be updated. The engine control module was updated; however, the failure persisted. The contact stated that the dealer test drove the vehicle and informed the contact that the vehicle was operating as intended. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline to report the failure. The approximate failure mileage was 300.

Filed Jul 22, 2026 · Engine, Transmission · TX

My car is misfiring. It WILL NOT accelerate as it should. It is like bogging down unable to accelerate when it needs to. It’s struggling. Hyundai is aware of the issue and making owners drive regardless while they “wait for a fix”. It’s extremely dangerous. I’ve almost been hit several times trying to merge onto a highway because it will not accelerate. I’ve had total loss of power one time, putting me and my infant in extreme danger. This has been happening since APRIL.

Filed Apr 16, 2026 · Engine · CA

While driving on a California freeway at approximately 70mph, the engine check light began flashing, the vehicle experienced a sudden and severe power loss, entered reduced power mode, and began violently shaking. Engine braking occurred without brake light activation, creating an immediate rear-end collision risk from following traffic. The vehicle would not stop shaking until restarted. This occurred twice — once in January 2026 and again in March 2026, both on the freeway with passengers in the vehicle. The dealer confirmed fault codes P0303 (Cylinder 3 Misfire), P0306 (Cylinder 6 Misfire), and P0300 (Random/Multiple Misfire) on both visits. On the first visit the dealer called the codes normal and returned the vehicle unrepaired. The second visit lasted 44 days. The dealer could not reproduce the fault during the entire 44-day period. A Hyundai Field Service Engineer physically visited the dealership and applied a special software update to the Engine Control Module. The closed repair order documents this as "UPDATE SPECIAL SOFTWARE INTO ENGINE CONTROL UNIT" with no TSB number, no software version before or after, and no GDS event number. The dealer confirmed they have no access to this update and cannot verify what was changed. No Proof of Correction was issued for California emissions compliance. The two recalls performed on the same repair order both have proper TSB numbers and STUI documentation. The ECM update has none. Concerned about emissions compliance and potential fault code suppression on a California-registered vehicle.

Filed Apr 13, 2026 · Electrical, Engine · CA

I have the video BUT I AM UNSURE how to upload or share Incident Description: The vehicle is experiencing intermittent, complete engine stalls while in motion at highway speeds. The failure has occurred four times. Initial Symptom: The issue first manifested as "stuttering" and erratic behavior from the Advanced Driver Assistance Systems (ADAS) which I thought it was. Escalation: The vehicle has since progressed to a total loss of power. During these incidents, I was forced to pull over on high-speed corridors (Hwy 46 and Hwy 5) to restart the vehicle. Recurring Pattern: Most recently, after a stall and restart, the vehicle stalled again within a few blocks. I have captured video evidence of the stall occurring immediately after the vehicle was "reset" and put back into motion. Safety Concern: This is a life-threatening defect. The vehicle loses propulsion without warning in high-speed traffic. The manufacturer’s service department (Hyundai) has been unable to identify a diagnostic fault code, citing "No Problem Found," and has only attempted a software/values reset, which has failed to correct the physical stalling.

Filed Mar 15, 2026 · Engine · FL

I am reporting a safety concern involving my 2026 Hyundai Palisade Limited involving repeated engine malfunction warning lights and diagnostic trouble code P001600 (camshaft/crankshaft timing correlation fault). This issue has occurred multiple times within the first 60 days of ownership and the vehicle has been taken to a Hyundai dealership twice. The dealer has not been able to determine a permanent repair and states the code is stored as a history fault without an available fix at this time. This defect is concerning because camshaft/crankshaft timing correlation faults can potentially result in engine stall, loss of power, or unexpected shutdown while driving, which could create a serious safety risk. I routinely drive long distances and transport two small children in this vehicle and no longer feel confident in the safety and reliability of this vehicle due to the unresolved engine defect. Additionally, I understand there is a recent safety recall affecting certain 2026 Hyundai Palisade vehicles, which increases my concern about the safety of this vehicle platform. I am submitting this complaint because this appears to be a potential safety defect involving engine operation that could affect safe driving conditions.

Filed Oct 7, 2025 · Acceleration, Fuel system · WI

I am a 77 year old senior and was driving my 2025 Hyundai Tucson Highbrid at approx. 70 MPH on the highway, then suddenly there was significant shuddering through the Tucson with noticeable loss of power. The Tucson dropped to 30 MPH. After that it would accelerate with significant shuddering. This would repeat several times while driving. In addition there were no Malfunctioning indicators, or warning lights. We were never so scared in our lives. This occurred on Thursday , October 2 nd.2025 at around 1:00 P. M. On highway 355 and 53 traveling Northbound.