P0138 on the 2004 Cadillac SRX
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 040604062 | 2004-12-27. Service bulletin. CHECK ENGINE LIGHT ILLUMINATED, DIAGNOSTIC TROUBLE CODES P0138, P0158 SET. *TT |
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| 01366 | 2003-11-20. Service bulletin. SERVICE ENGINE SOON LIGHT ON WITH O2 SENSOR DIAGNOSTIC TROUBLE CODES (DTCS) P0138, P0151. *TT TO INCLUDE P0030, P0036, P0050, P0056. *TT |
2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.