C12B3 on the 2020 Audi S6
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.
| TSB_2054202_8 | 2026-10-05. Service bulletin. This bulletin provides information when there is an Audi adaptive light system malfunction; DTC C12B3FA is stored in the control module for driver assistance systems. |
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| TSB_2054202_7 | 2026-04-07. Service bulletin. This bulletin provides information when the Audi adaptive light system malfunctions; DTC C12B3FA is stored in the control module. |
| TSB_2059201_9 | 2025-11-08. Service bulletin. This bulletin provides information when high beam assist, or traffic sign detection limited, DTC C12B3FD may be stored in the DAS control module. |
| TSB_2054202_6 | 2025-11-08. Service bulletin. This bulletin provides informaton when there is an adaptive light system malfunction; DTC C12B3FA stored in the control module for driver assistance systems. |
| A9624112059201_8 | 2024-12-04. Service bulletin. This bulletin provides information when high beam assist, or traffic sign detection limited, DTC C12B3FD may be stored in the DAS control module. |
| A9623852059201_6 | 2023-05-05. Service bulletin. This bulletin contains information for when the message appears in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD. |
| A9622772059201_5 | 2022-05-05. Service bulletin. This bulletin contains information for when the messages appear in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD. |
| A9622752054202_5 | 2022-02-04. Service bulletin. This bulletin contains repair information for when there is an Audi adaptive light fault with DTCs C12B3FA. |
| A9621632059201_4 | 2021-04-06. Service bulletin. This bulletin contains information for when the messages appear in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD. |
| A9620532059201_3 | 2020-07-07. Service bulletin. This bulletin contains information for when the messaegs appear in the instrument cluster about the high beam assist and/or traffic sign detection with DTC C12B3FD. |
10 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.