Audi A4 2009–2013 — technical service bulletin
Bulletin A011324 2033001- · NHTSA communication 10124675 · issued Aug 20, 2013
Technical service bulletin
communication type
Engine and Engine Cooling
component
2009–2013
model years
16
vehicle entries
Official summary
Supersedes Technical Service Bulletin Group 01 number 13-01 dated May 29, 2013. MIL on. DTCs are stored in the engine control module. Mileage is greater than 15,000 miles. Under certain driving conditions, the secondary air ports in the cylinder head can accumulate carbon over time, causing a restriction.
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.