P0401 on the 1994 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.
Nobody has written a description of this code yet.
| 090199 | 1999-10-28. Service bulletin. INFORMATION ON TROUBLESHOOTING EXHAUST GAS RECIRCULATION (EGR) DIAGNOSTIC TROUBLE CODES (DTC) P0401 AND P1491. *TT |
|---|
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.