Check engine light turned on at engine startup, with DTC P0531:00 stored in memory
Mazda technical service bulletin 07-001-25c for 2024-2025 Mazda CX-90 and 2025 Mazda CX-70.
- Bulletin number
- 07-001-25c
- Component
- Unknown or other
- Summary
- Some vehicles may exhibit check engine light turned on at engine startup, with DTC P0531:00 stored in memory. DTC P0531:00 [PCM] - Refrigerant pressure sensor No.1 system: Function malfunction • This is caused by improper control logic of the PCM and the dash-electrical supply unit (Dash-ESU). To eliminate this concern, the control logic of the PCM and the Dash-ESU has been modified.
Vehicles covered
- Mazda CX-90 2024-2025 20242025
- Mazda CX-70 2025 2025
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