Acura TL 1999 — technical service bulletin
Bulletin 03027 · NHTSA communication 10004802 · issued Nov 21, 2003
Technical service bulletin
communication type
Engine and Engine Cooling
component
1999
model years
1
vehicle entries
Official summary
Malfunction indicator lamp is on with diagnostic trouble code p0420 (catalyst system efficiency below threshold) is stored. *tt *mj
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.