P0638 on the 2000 Saturn LS
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.
| 040604085 | 2005-01-26. Service bulletin. SERVICE ENGINE SOON (SES) AND/OR REDUCED POWER LAMP ILLUMINATING FOLLOWING COLD ENGINE START UP IN SUBFREEZING TEMPERATURES, DIAGNOSTIC TROUBLE CODES (DTC) P0638, P1510 AND/OR P1516 STORED IN ENGINE CONTROL MODULE (ECM). *TT |
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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.