Service bulletins for the 2023 Audi A4 allroad
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.
671 on file from NHTSA, as of 2026-10-19.
About P0456 on the 2023 Audi A4 allroad: 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: P0456 are shown. Show all
| TSB_2078916_3 | 2026-07-07. Service bulletin. FUEL/PROPULSION SYSTEM. This bulletin provides information when the fuel tank cap seal is leaking; DTC P044200, P045600 and/ or P00EF00 in stored in the ECM. |
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| TSB_2078916_2 | 2025-11-08. Service bulletin. FUEL/PROPULSION SYSTEM. This bulletin provides information when the fuel tank cap seal is leaking; DTC P044200, P045600 and/ or P00EF00 in stored in the ECM. |
| TSB_2078916_1 | 2025-09-04. Service bulletin. FUEL/PROPULSION SYSTEM. This TSB provides information when the fuel tank cap seal is leaking, DTC P044200, P045600, and/or P00EF00 stored in ECM. |
| A0124412071199_4 | 2024-11-06. Service bulletin. ENGINE. This bulletin provides information when the MIL is on P045600 Very Small Leak Detected - NVLD. |
| A0124122071199_3 | 2024-04-04. Service bulletin. UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING:ENGINE. This bulletin provides information when the MIL is illuminated, P045600 Very Small Leak detected - NVLD. |
| A0123692071199_2 | 2023-09-01. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information for when the MIL is on and P045600 is stored. |
| A0123662071199_1 | 2023-09-01. Service bulletin. FUEL SYSTEM, GASOLINE. This bulletin provides information for when the MIL is on with DTC P045600 Very Small Leak detected NVLD. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.