P0531 on the 2025 Mazda CX-70
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.
| 07-003-25b | 2025-05-02. Service bulletin. Some vehicles may experience issues with the remote/timer air conditioners (pre-conditioning system) not working, or not functioning after activation. NOTE: If DTC P0531 is present, see TSB 07-001/25. This may be caused by improper control logic of the dash- |
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| 07-001-25c | 2025-05-02. Service bulletin. 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. |
| 07-001-25b | 2025-04-01. Service bulletin. 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. |
| 07-001-25a | 2025-02-04. Service bulletin. [TEMPORARILY SUSPENDED] 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. |
| 07-001-25 | 2025-02-04. Service bulletin. 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. |
| 07-004-24a | 2025-01-04. Service bulletin. 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. |
| SA-003-24a | 2024-08-02. Service bulletin. Some customers with a PHEV CX-90 may report a warning light or a reported issue of A/C malfunction. Upon inspection, the technician will discover that the vehicle has the P0531 diagnostic trouble code set. |
7 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.