Service bulletins for the 2018 Buick Regal TourX
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.
287 on file from NHTSA, as of 2026-10-19.
About P0300 on the 2018 Buick Regal TourX: what the code means, and the bulletins and recalls about the same components.
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By component
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Only bulletins with trouble code: P0300 are shown. Show all
| 21-NA-036 | 2022-03-30. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT. This service bulletin advises the technician of a diagnostic test for a possible issue with a damaged OCV solenoid that may cause an oil leak and misfire, illuminating the MIL and setting DTCs P0300, P0302 and/or P0305. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.