Service bulletins for the 2020 Hyundai Kona
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.
108 on file from NHTSA, as of 2026-10-19.
About P0304 on the 2020 Hyundai Kona: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P0304 are shown. Show all
| 20-FL-006H | 2020-07-08. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information related to the Engine Control Module (ECM) software logic update for DTC P0300-P0304 Misfire. This update addresses an incident of intermittent misfire that may only occur at cold engine warmup. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.