P0304 on the 2008 Honda Civic
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.
| APaS06132017901 | 2017-07-31. Service bulletin. Dealer message - American Honda (AHM) is investigating certain 2008 Civic CNGs with a customer complaint of rough idle or Malfunction Indicator Lamp (MIL) on with the misfire DTCs P0300 through P0304 stored. To fully understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
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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.