Cadillac CTS 2003 — technical service bulletin
Bulletin 050803 · NHTSA communication 10003641 · issued May 8, 2003
Technical service bulletin
communication type
Electrical System
component
2003
model years
1
vehicle entries
Official summary
Service engine soon (ses) light coming on and a p0121 tps code stored or related codes. *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.