Hyundai Sonata 2020–2023 — service campaign
Bulletin 24-01-020H DBP · NHTSA communication 11010975 · issued Nov 14, 2024
Service campaign
communication type
Fuel/propulsion System
component
2020–2023
model years
4
vehicle entries
Official summary
Certain 2021-2023MY Sonata (DN8) and 2020-2022MY Sonata (DN8A) vehicles may have Diagnostic Trouble Code (DTC) P0451 stored in the Electronic Control Unit (ECU). The California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed Federal and California standards.
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.