Service bulletins for the 2003 Saturn Ion
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
499 on file from NHTSA, as of 2026-10-19.
About P0621 on the 2003 Saturn Ion: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: P0621 are shown. Show all
| 030603010 | 2004-03-04. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE. SERVICE MANUAL UPDATE REGARDING TROUBLESHOOTING TABLE FOR DIAGNOSTIC TROUBLE CODE (DTC) P0621. *TT |
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| 060303010 | 2004-02-19. Service bulletin. ENGINE AND ENGINE COOLING. SERVICE MANUAL UPDATE REGARDING TROUBLESHOOTING TABLE FOR DIAGNOSTIC TROUBLE CODE (DTC) P0621. *PH |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.