Service bulletins for the 2011 Audi A4
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
543 on file from NHTSA, as of 2026-10-19.
About P0492 on the 2011 Audi A4: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: P0492 are shown. Show all
| 26 12 15 2026528 | 2022-05-31. Service bulletin. ELECTRICAL SYSTEM; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:AIR HANDLER/CHAMBER, DUCTS, AND VALVES. MIL on. DTC P0491 and P0492 (Secondary Air System Insufficient Flow, Bank 1/2) are stored at the same time. |
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| 26 12 15 2026528 | 2022-05-02. Service bulletin. ELECTRICAL SYSTEM. DTC P0491 and P0492 (Secondary Air System Insufficient Flow, Bank 1/2) are stored at the same time. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.