C2A27 on the 2025 Hyundai Sonata
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 24-01-093H | 2024-12-14. Service campaign. Certain Sonata (DN8) and Sonata Hybrid (DN8 HEV) vehicles may exhibit DTC C2A274B due to the rear corner radar missing the outside temperature input from the ADAS sensor. Follow the procedures in this bulletin to input the external temperature from the cluster and correct the rear corner radar temperature software using GDS. |
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1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.