P1491 on the 1995 Honda Accord
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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 090199 | 1999-10-28. Service bulletin. INFORMATION ON TROUBLESHOOTING EXHAUST GAS RECIRCULATION (EGR) DIAGNOSTIC TROUBLE CODES (DTC) P0401 AND P1491. *TT |
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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.