# P0128 on the 2012 Mazda Mazda5

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.

## Bulletins for this model year that name P0128

- [10097749](https://open.wenmarpro.com/bulletins/10097749), 2017-04-24: SOME VEHICLES MAY EXPERIENCE THE MIL ON WITH DTC P0128:00 \(THERMOSTAT STUCK OPEN\). THIS CONCERN IS CAUSED BY IMPROPER CONTROL LOGIC OF THE PCM. TO CORRECT THE PROBLEM, THE CONTROL LOGIC OF THE PCM HAS BEEN CHANGED.
- [10097397](https://open.wenmarpro.com/bulletins/10097397), 2017-04-14: SOME VEHICLES MAY EXPERIENCE THE MIL ON WITH DTC P0128:00 \(THERMOSTAT STUCK OPEN\). THIS CONCERN IS CAUSED BY IMPROPER CONTROL LOGIC OF THE PCM. TO CORRECT THE PROBLEM, THE CONTROL LOGIC OF THE PCM HAS BEEN CHANGED.
- [10097396](https://open.wenmarpro.com/bulletins/10097396), 2017-04-14: SOME VEHICLES MAY EXPERIENCE THE MIL ON WITH DTC P0128:00 \(THERMOSTAT STUCK OPEN\). THIS CONCERN IS CAUSED BY IMPROPER CONTROL LOGIC OF THE PCM. TO CORRECT THE PROBLEM, THE CONTROL LOGIC OF THE PCM HAS BEEN CHANGED.