C12D5 on the 2021 Porsche 911
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.
| No. 75-25 | 2026-09-04. Service bulletin. Technical Information for Various White Messages Regarding Driver Assistance Systems/Fault Memory Entry "C12D5FA" in the ZFAS Control Unit |
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| No. 11-25 | 2025-11-06. Service bulletin. Technical information for Various Error Messages regarding Driver Assistance Systems in the Instrument Cluster / Passive Fault Memory Entry "C12D5FA" in the Driver Assistance System Control Unit |
| No. 11-25 | 2025-05-06. Service bulletin. Technical information for Various Error Messages regarding Driver Assistance Systems in the Instrument Cluster / Passive Fault Memory Entry "C12D5FA" in the Driver Assistance System Control Unit |
| No. 11-25 | 2025-04-07. Service bulletin. Technical Information - Various Error Messages regarding Driver Assistance Systems in the Instrument Cluster / Passive Fault Memory Entry "C12D5FA" in the Driver Assistance System Control Unit (ZFAS) (11/25) |
4 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.