# P0128 on the 2018 Ford Fiesta

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

- [10159463](https://open.wenmarpro.com/bulletins/10159463), 2019-05-06: Some 2016\-2019 Fiesta vehicles built on or before 19\-Feb\-2019 may exhibit an illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble code \(DTC\) P0128 stored in the powertrain control module \(PCM\). This may be due to some PCM software parameters related to engine temperature. To resolve the condition, reprogram the PCM.
- [10153971](https://open.wenmarpro.com/bulletins/10153971), 2019-03-04: Some 2018\-2019 Fiesta vehicles may exhibit an illuminated MIL with DTC P0128 stored in the powertrain control module \(PCM\). If the vehicle exhibits this DTC, clear all DTCs and allow the vehicle to sit for a minimum of 3 hours. Then drive the vehicle for at least 16 km \(10 miles\) and retest for DTCs. If DTC P0128 does not return, do not replace the thermostat valve, release the vehicle at this time. If DTC P0128 returns, refer to the Powertrain Control/Emissions Diagnosis \(PC/ED\) Manual for normal diagnostics. Engineering is investigating, monitor OASIS for updates.