Cadillac Deville 2000–2003 — technical service bulletin
Bulletin 040604022 · NHTSA communication 10012595 · issued Apr 1, 2004
Technical service bulletin
communication type
Engine and Engine Cooling
component
2000–2003
model years
10
vehicle entries
Official summary
Powertrain control module will not properly communicate on board diagnostic oxygen sensor test information to non-tech2 service or test equipment. *eh
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.