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C1620 on the 2021 Genesis G80

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.

Bulletins for this model year that name C1620
25-BE-007G TSB2025-04-15. Service bulletin. Certain 2021-2023MY GV80 (JX1), 2022-2023MY GV70 (JK1), 2021-2023MY G80 (RG3) and 2023MY G80 Electrified (RG3 EV) vehicles may exhibit a warning light with DTC C162078 due to improper detection of steel structures. Advanced Driver Assistance System (ADAS) functions are not affected due to this condition. Follow the procedure in this bulletin to update the front radar unit and perform all related adjustments according to shop manual.

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.