P0400 on the 1999 Nissan Frontier
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.
| 05040 | 2005-08-18. Service bulletin. MIL WITH DTC P0400, P0402, ROUGH IDLE, DRIVABILITY INCIDENTS, DIFFICULTY SETTING EGR SRT. *SC |
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| 05040A | 2005-08-16. Service bulletin. 1998-2000 FRONTIER & XTERRA WITH KA24 ENGINE; MIL WITH DTC P0400, P0402, ROUGH IDLE, DRIVABILITY INCIDENTS, DIFFICULTY PASSING I/M TEST FOR NO X UPDATE *SC |
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.