P0456 on the 2015 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.
| TSB_FUE049 | 2021-02-02. Service bulletin. TECHNICAL SERVICE BULLETIN: COMBINATION TSB / SERVICE ACTION: AIR FILTER AND NVLD REPLACEMENT (SA447) - This bulletin provides the procedure to perform an evaporative leak test and replace the Fuel Tank Air Filter, and, if necessary, the Natural Vacuum Leak Detector (NVLD) on some 11-16MY Kia vehicles listed in the table below, which may experience an evaporative leak concern with DTC P0456. |
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| PS469 | 2017-08-02. Service bulletin. PITSTOP: MANUAL EVAPORATIVE EMISSIONS TEST FOR HARD TO FIND/SMALL LEAKS - If the malfunction indicator lamp (MIL) is illuminated with DTC(s) P0442, P0455, P0456, or P0457 (Evaporative Emissions System-Leak detected) and the evaporative (EVAP) leak self-test resulted in NTF, a manual EVAP test is recommended. |
| PS322 | 2017-08-02. Service bulletin. PIT STOP: DTC P0456 AND CHARCOAL CANISTER LEAKS - When addressing a concern related to a DTC P0456 (Evaporative Emissions System ? Small Leak Detected), and an inspection of the vapor lines, connections and fuel cap reveal no abnormalities, closely inspect the mounting holes of the charcoal canister for visible cracks. |
3 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.