P0038 on the 2004 Toyota Sienna
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.
| 04104 | 2004-11-05. Service bulletin. MALFUNCTION INDICATOR LAMP (MIL) ON, DIAGNOSTIC TROUBLE CODE (DTC) P0037, P0038 OR P0136. *NM |
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1 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.