P0300 on the 2008 Kia Rio
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.
| TSB-066 | 2010-10-29. Service bulletin. KIA: COMBINED TSB/SERVICE ACTION ECM UPGRADE FOR MULTIPLE DTC'S LISTED-P0300, P0128, P0140, P0451, P0461. PROVIDES THE PROCEDURE TO UPGRADE THE ENGINE CONTROL MODULE (ECM) OF SOME VEHICLES (MAP SENSORS ONLY) WHICH MAY EXPERIENCE A ROUGH IDLE DURING INITIAL COLD START UP PERIOD AND/OR ILLUMINATE THE MIL WITH DTC'S BELOW. *PE |
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| TSB-033 | 2010-05-01. Service bulletin. KIA: ECM UPGRADE-MIL ON WITH DTC P0300, P0128, P0140, P0442 & P0461. VEHICLES MAY EXPERIENCE A ROUGH IDLE DURING INITIAL COLD START UP PERIOD AND/OR ILLUMINATE THE MIL. *PE UPDATED 10/29/10. *PE |
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.