Service bulletins for the 2024 Mazda CX-90
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
552 on file from NHTSA, as of 2026-10-19.
About P0531 on the 2024 Mazda CX-90: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P0531 are shown. Show all
| 07-003-25b | 2025-05-02. Service bulletin. UNKNOWN OR OTHER. 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. UNKNOWN OR OTHER. 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. UNKNOWN OR OTHER. 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. ELECTRICAL SYSTEM; ENGINE. [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. ENGINE; ELECTRICAL SYSTEM. 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. UNKNOWN OR OTHER; ENGINE. 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. |
| 07-004-24b | 2024-09-04. Service bulletin. UNKNOWN OR OTHER. Some vehicles may exhibit that, after using the cabin preconditioning, when starting the engine, the CHECK ENGINE light illuminates with DTC P0531:00 (Refrigerant pressure sensor No.1 system: Function malfunction) stored in memory. NOTE: If the cabin preconditioning was not used, this TSB is not applicable. (DTC P0531:00 concern without using the cabin preconditioning is under investigation.) This is caused by improper control logic of the PCM. To eliminate this concern, the control logic of the PCM has been modified. |
| SA-003-24a | 2024-08-02. Service bulletin. UNKNOWN OR OTHER. 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. |
| SA-003-24 | 2024-02-02. Service bulletin. EQUIPMENT; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. 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. |
| SA-084-23 | 2024-01-04. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM. 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. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.