P0456 on the 2015 Acura RDX
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.
| Service Bulletin | 2017-08-15. Service bulletin. Service bulletin - The TIGHTEN FUEL CAP message is on or DTC P0455 (EVAP system large leak) and/or DTC P0456 (EVAP system very small leak detected) set. During short drive cycles, the PCM may misinterpret inputs from the evaporative system. |
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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.