Chrysler Pacifica 2020–2021 — technical service bulletin
Bulletin S2118000009 · NHTSA communication 10223446 · issued May 24, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2021
model years
14
vehicle entries
Official summary
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.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.