P20F8 on the 2025 Mazda Mazda3
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 01-003-26a | 2026-05-03. Service bulletin. This bulletin supersedes the previously issued bulletin(s) listed below. The changes are noted in Red text. 01-003/26 01/30/26 Some vehicles may exhibit a check engine light ON with DTC P20F8:00 stored. P20F8:00 - Swirl control circuit range/performance problem. In these cases, increasing temperature levels of the Swirl Control Valve (SCV) motor due to excessive actuation leads to duty limitation, causing poor openingangle response and resulting in a stuck judgment. To eliminate this concern, the PCM logic has been modified. REPAIR PROCEDURE Reprogram the PCM with the Mazda Modular Diagnostic System (M-MDS), using Mazda Diagnostic and Repair Software (MDARS). Refer to MDARS ECU Reprogramming Procedure. |
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| 01-003-26 | 2026-02-03. Service bulletin. Some vehicles may exhibit a check engine light ON with DTC P20F8:00 stored. P20F8:00 - Swirl control circuit range/performance problem. • The DTC is caused by overheating of the Swirl Control Valve (SCV) motor which leads to duty limitation, causing poor openingangle response and resulting in stuck judgment. To eliminate this concern, the PCM control software has been modified. |
2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.