# Service bulletin 07\-004\-24b

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.

- Type: Service bulletin
- NHTSA id: 11006893
- Published by NHTSA: 2024\-09\-04
- Manufacturer's number: 07\-004\-24b
- Manufacturer's date: 2024\-08\-07
- NHTSA component: UNKNOWN OR OTHER
- Manufacturer's system: Air Conditioning

## NHTSA's summary

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.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11006893-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11006893-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Trouble codes named

P0531

## Vehicles listed

- 2024 MAZDA CX\-90

JSON: [/v1/bulletins/11006893](/v1/bulletins/11006893)

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