Audi A4 2009–2012 — technical service bulletin
Bulletin A011330 2027082- · NHTSA communication 10121321 · issued Sep 20, 2013
Technical service bulletin
communication type
Engine
component
2009–2012
model years
16
vehicle entries
Official summary
Supersedes Technical Service Bulletin Group 24 number 12-28 dated April 24, 2012. MIL on. DTC P0234 (Turbo/Super Charger Overboost Condition) is stored in the engine control module, J623 (address word 01). No other DTCs are stored. DTC P0234 can be set inadvertently by the software application. DTC P0234 can be set with an actual cause in combination with loss of engine power and low/uneven engine performance, based on charge pressure control.
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.