Cadillac Deville 2002 — technical service bulletin
Bulletin 090102 · NHTSA communication 629674 · issued Jan 9, 2002
Technical service bulletin
communication type
Electrical System
component
2002
model years
3
vehicle entries
Official summary
Concerns with diagnostic codes p0420, converter efficiency, p0121 tps performance and p0133 and p0153, o2 sensor slow response. *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.