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May 1, 2026 Service bulletin

This bulletin supersedes the previously issued bulletin(s) listed below

Mazda technical service bulletin 01-003-26a for 2023-2025 Mazda MAZDA3, 2024-2025 Mazda CX-5 and 2023-2025 Mazda CX-30 and others.

Bulletin number
01-003-26a
Component
Power train
Summary
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 openingô€€€angle 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.

Owners of these vehicles have filed 29 complaints in the transmission category.

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