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May 21, 2025 Service bulletin

Some customers may experience the battery and engine warning lights illuminating with following DTC being...

Mazda technical service bulletin 01-004-25 for 2022-2023 Mazda MAZDA3 and 2022-2023 Mazda CX-30.

Bulletin number
01-004-25
Component
Engine
Summary
Some customers may experience the battery and engine warning lights illuminating with following DTC being stored. P0A7A:00 (ISG) Integrated starter generator (ISG) (internal stator coil driver circuit) U-phase, V-phase, W-phase: Malfunction detected P1BC5:00 (ISG) Integrated starter generator (ISG) (internal stator coil driver circuit) X-phase, Y-phase, Z-phase: Malfunction detected This concern is caused by improper overcurrent detection logic of the DTC. To eliminate this concern, the Integrated Starter Generator (ISG) control software has been modified to optimize the threshold for DTC detection.

Owners of these vehicles have filed 15 complaints in the engine category.

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