P0491 on the 2017 Aston Martin DB11
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.
Nobody has written a description of this code yet.
| SB-03-0450V2 | 2019-03-11. Service bulletin. V12 Secondary air injection codes P0492 P0491 |
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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.