P0128 on the 2017 Kia Optima
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.
| TSBENG206 | 2019-08-07. Service bulletin. TSB: 1.6T GDI ULEV MIL ON LOGIC IMPROVEMENT FOR P0128 - This bulletin provides the procedure to improve the logic of the ECU (Electronic Control Unit) on some 2016-2017MY Optima (JFa) 1.6T GDI ULEV DCT vehicles, produced from September 28, 2015 through September 03, 2016, which exhibit a MIL (Malfunction Indicator Lamp) illuminated with DTC P0128, even though there are no system faults. |
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1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.