2026 Hyundai Palisade Engine Problems

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.

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.

I have been continuously receiving check engine notifications that show the engine cylinders misfiring. This seems to only happen at highway speeds which could cause a safety hazard should the driver need to accelerate for merging/passing/etc. I have brought this issue into the dealership once so far and they said they couldn't do anything since they were unable to replicate the issue while driving it. From what I've seen online, many other owners of this vehicle are having similar problems with the same responses from their local dealerships.