Service bulletins for the 2021 Mazda Mazda2
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.
80 on file from NHTSA, as of 2026-10-19.
About P0300 on the 2021 Mazda Mazda2: 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
| 01-012-24 | 2025-01-04. Service bulletin. ENGINE. Some vehicles may exhibit the check engine light ON with DTC P0300:00 (Random misfire detected) stored. This may be caused by a mis-detection of a misfire due to improper PCM control logic. To eliminate this concern, the PCM control logic has been modified. |
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| 01-002-24a | 2024-10-04. Service bulletin. ENGINE. Some customers may experience a check engine light illumination at idle while stopped with DTC P0300:00 stored, resulting in rough idle conditions. • P0300:00: Random misfire detected This concern is caused by improper engine control in the idle range. To eliminate the concern, the PCM control software has been modified. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.