Audi A4 2009–2012 — technical service bulletin
Bulletin 131420312455 · NHTSA communication 10216700 · issued Jun 7, 2013
Technical service bulletin
communication type
Engine and Engine Cooling
component
2009–2012
model years
16
vehicle entries
Official summary
Under certain driving conditions, the linkage for the waste gate actuation can encounter excessive wear which leads to play at the waste gate flap. This leads to boost escaping through a loose flap, which sets DTC P0299 (Negative Pressure Deviation).
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.