Hyundai Palisade 2020–2025 — service campaign
Bulletin 26-01-010H DN · NHTSA communication 11028664 · issued Feb 3, 2026
Service campaign
communication type
Engine
component
2020–2025
model years
6
vehicle entries
Official summary
Certain Palisade (LX2) vehicles equipped with 3.8L GDI Lambda II engines may not meet engine-out NOx (Nitrogen Oxides) and Particulate Matter (PM) emission standards. The service procedure provides an update to the emission logic within the Engine Control Module (ECM) to improve engine-out NOx and PM emissions, so they are within permissible specifications. Additionally, improvements to reduce noise during engine start, and enhanced thermostat logic, are also included in the updated ECM software.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.