Service bulletins for the 2014 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.
645 on file from NHTSA, as of 2026-10-19.
About P0299 on the 2014 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: P0299 are shown. Show all
| A211522 2039006- | 2018-02-05. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Supersedes Technical Service Bulletin Group 21 number 14-21 dated November 26, 2014. The MIL is on. Customer may report a reduction in power. DTC P029900 (Turbo/Super Charger Underboost) is stored in the engine control module (ECM), J623 (address word 01). The circlip connecting the turbo wastegate actuator rod and the wastegate flap lever can fall off due to low tension of the clip. Consequently, the wastegate linkage becomes disconnected, causing MIL on and DTC P029900. |
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| A211421 2039006- | 2017-12-05. Service bulletin. ENGINE. Supersedes Technical Service Bulletin Group 21 number 14-20 dated November 17, 2014. MIL on. Customer may report a reduction in power. DTC P029900 (Turbo/Super Charger Underboost) is stored in the engine control module (ECM), J623 (address word 01). The circlip connecting the turbo wastegate actuator rod and the wastegate flap lever can fall of due to low tension of the clip. Consequently, the wastegate linkage becomes disconnected, causing MIL on and DTC P029900. |
| A211420 2039006- | 2017-12-05. Service bulletin. ENGINE. MIL on. Customer may report a reduction in power. DTC P029900 (Turbo/Super Charger Underboost) is stored in the engine control module (ECM), J623 (address word 01). The circlip connecting the turbo wastegate actuator rod and the wastegate flap lever can fall of due to low tension of the clip. Consequently, the wastegate linkage becomes disconnected, causing MIL on and DTC P029900. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.