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P0456 on the 2008 Saturn Astra

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.

Bulletins for this model year that name P0456
0806040242008-08-27. Service bulletin. MALFUNCTION INDICATOR LAMP (MIL)/CHECK ENGINE LIGHT ON, DTCS P0442, P0455, P0456 SET (DIAGNOSE AND REPLACE FUEL FILL CAP AND FILLER PIPE, IF NECESSARY). *PE
08-06-04-0242008-07-12. Service bulletin. MALFUNCTION INDICATOR LAMP (MIL)/CHECK ENGINE LIGHT ON, DTC'S P0442, P0455, P0456 SET (DIAGNOSE AND REPLACE FUEL FILL CAP AND FILLER PIPE, IF NECESSARY). *NJ

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.