C11A4 on the 2020 Porsche Cayenne
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. 231-24 | 2025-03-05. Service bulletin. Technical Information - Flashing Function for Auxiliary Headlights Faulty / Fault Memory Entry "C11A401" in Control Unit for Headlight Bulb: Re-Code Control Unit for Headlight Bulb (231/24) |
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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.