# P0128 on the 2018 Hyundai Elantra GT

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

- [10181000](https://open.wenmarpro.com/bulletins/10181000), 2020-10-08: This bulletin provides information related to an ECM \(Engine Control Module\) software update for DTC P0128: Coolant Thermostat \(Coolant Temp below Thermostat Regulating Temperature\) logic revision. There are no drivability symptoms associated with DTC P0128.
- [10169379](https://open.wenmarpro.com/bulletins/10169379), 2019-12-16: This bulletin provides information related to an ECM \(Engine Control Module\) software update for DTC P0128: Coolant Thermostat \(Coolant Temp below Thermostat Regulating Temperature\) logic revision. There are no drivability symptoms associated with DTC P0128.
- [10169378](https://open.wenmarpro.com/bulletins/10169378), 2019-12-16: Hyundai has launched a Service Campaign to update the ECM \(Engine Control Module\) software for DTC P0128: Coolant Thermostat \(Coolant Temp below Thermostat Regulating Temperature\) logic improvement.
- [10160156](https://open.wenmarpro.com/bulletins/10160156), 2019-05-20: Hyundai has launched a Service Campaign to update the ECM \(Engine Control Module\) software for DTC P0128: Coolant Thermostat \(Coolant Temp below Thermostat Regulating Temperature\) logic improvement.
- [10160154](https://open.wenmarpro.com/bulletins/10160154), 2019-05-20: This bulletin provides information related to an ECM \(Engine Control Module\) software update for DTC P0128: Coolant Thermostat \(Coolant Temp below Thermostat Regulating Temperature\) logic revision.