Service bulletins for the 2018 Kia Rio
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.
70 on file from NHTSA, as of 2026-10-19.
About P0300 on the 2018 Kia Rio: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P0300 are shown. Show all
| TSBENG186 | 2018-05-14. Service bulletin. ELECTRICAL SYSTEM. TSB - SERVICE ACTION: SPARK PLUG REPLACEMENT (SA342) - This bulletin provides the procedure to replace the spark plugs on some 2018MY Forte (YDm), produced from November 21, 2017 through April 12, 2018, and 2018MY Rio (SC) vehicles, both produced from November 22, 2017 through February 6, 2018, which may exhibit a malfunction indicator lamp (MIL) ON with DTCs P0300 through P0304 due to the spark plug porcelain cracking during manufacturing. Follow the procedure outlined in this bulletin to replace all four spark plugs, whether or not the MIL is ON. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.