P0128 on the 2017 Hyundai Elantra
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.
| 5NP-A2Y3D-05 | 2018-05-21. Service bulletin. This bulletin provides a procedure for replacing the thermostat on certain 2017 Elantra vehicles. The thermostat may not function properly and may result in Diagnostic Trouble Code P0128. Replacement of thermostat is required even without a P0128 code. |
|---|---|
| 5NP-V2N3H-09 | 2016-10-05. Service bulletin. THIS BULLETIN PROVIDES A PROCEDURE FOR REPLACING THE THERMOSTAT ON CERTAIN 2017 ELANTRA VEHICLES. THE THERMOSTAT MAY FUNCTION IMPROPERLY AND MAY RESULT IN DIAGNOSTIC TROUBLE CODE P0128. NO DRIVABILITY ISSUES ARE ASSOCIATED WITH THIS CONDITION. |
2 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.