Audi A4 2012–2014 — technical service bulletin
Bulletin 132820350732 · NHTSA communication 10216678 · issued Nov 14, 2013
Technical service bulletin
communication type
Fuel System, Gasoline
component
2012–2014
model years
20
vehicle entries
Official summary
After the engine is switched off, the fuel system creates a natural vacuum as the fuel in the fuel tank cools off. If the natural vacuum leak detection (NVLD) system cannot detect this natural vacuum during the system self-test, the DTC will be stored in the ECM.
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.