P0456 on the 2004 Toyota Highlander
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.
| 04804 | 2005-02-01. Service bulletin. REPAIR MANUAL SUPPLEMENT: LEV II EVAP SYSTEM CHECK - DIAGNOSTIC TROUBLE CODE (DTC) P0441, P0442, P0446, P0451, P0452, P0453, P0455 AND P0456. *NM |
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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.