Audi A4 1998–2003 — technical service bulletin
Bulletin 0408 · NHTSA communication 10009732 · issued Sep 10, 2004
Technical service bulletin
communication type
Fuel System, Other
component
1998–2003
model years
16
vehicle entries
Official summary
Long term fuel trim - system too rich. Diagnostic trouble code p1123, p1125, p1137 and p1139. *tt
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.