Hyundai Tucson 2018 — technical service bulletin
Bulletin 19-FL-004H · NHTSA communication 10163865 · issued Jul 12, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018
model years
1
vehicle entries
Official summary
This bulletin provides information related to the Engine Control Module (ECM) software logic update for the DTC P0128 ? ?Coolant thermostat - coolant temp below thermostat regulating temperature?.
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.