Hyundai Accent 2019 — technical service bulletin
Bulletin 19-01-008H · NHTSA communication 10158799 · issued Mar 11, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019
model years
1
vehicle entries
Official summary
This bulletin provides information related to an ECM (Engine Control Module) software update for DTC P0128 ?Coolant temp Below thermostat regulating Temperature? logic improvement. There are no drivability symptoms associated with DTC P0128.
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.