# P0128 on the 2017 Ram Promaster City

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

- [10224759](https://open.wenmarpro.com/bulletins/10224759), 2022-10-24: Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that the following DTCs has been set:U1424 \- Implausible Engine Torque Signal Received. U0402 \- Implausible Data Received From TCM. P1DD2\-00 \- Torque Request Signal From TCM Denied. P0128 \- Thermostat Rationality. Enhancement also included:Improved calibrations for catalyst overtemp protection.
- [10121877](https://open.wenmarpro.com/bulletins/10121877), 2017-11-03: Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module \(PCM\) with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Code \(DTC\) has been set. P0128 \- Thermostat Rationality.