# P0128 on the 2021 Jeep Gladiator

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

- [10251767](https://open.wenmarpro.com/bulletins/10251767), 2024-03-18: Thermostat Assy For 2022\-2024MY 3.6L Pentastar Upgrade with P0128 failure code. PRIOR TO PERFORMING ANY THERMOSTAT REPLACEMENT, PROCEED WITH INSPECTION INSTRUCTIONS FROM THE LATEST VERSION OF STAR ONLINE PUBLICATION S2309000014
- [10230058](https://open.wenmarpro.com/bulletins/10230058), 2023-01-17: Customer complains of a MIL\-on condition. Upon further inspection, there is a Diagnostic Trouble Code \(DTC\) P0128 Coolant Thermostat \(Coolant Temperature Below Thermostat Regulating Temperature\) set in the PCM.
- [10223446](https://open.wenmarpro.com/bulletins/10223446), 2022-10-17: Customer complains of a MIL\-on condition. Upon further inspection, there is a Diagnostic Trouble Code \(DTC\) P0128 Coolant Thermostat \(Coolant Temperature Below Thermostat Regulating Temperature\) set in the PCM.
- [10223286](https://open.wenmarpro.com/bulletins/10223286), 2022-10-17: Customer complains of a MIL\-on condition. Upon further inspection, there is a Diagnostic Trouble Code \(DTC\) P0128 Coolant Thermostat \(Coolant Temperature Below Thermostat Regulating Temperature\) set in the PCM.
- [10198380](https://open.wenmarpro.com/bulletins/10198380), 2021-06-28: Customer complains of a MIL\-on condition. Upon further inspection, there is a Diagnostic Trouble Code \(DTC\) P0128 Coolant Thermostat \(Coolant Temperature Below Thermostat Regulating Temperature\) set in the PCM.