P1491 on the 2002 Nissan Xterra
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.
| 02017B | 2003-02-13. Service bulletin. MALFUNCTION INDICATOR LAMP (MIL) ON WITH DIAGNOSTIC TROUBLE CODE (DTC) P1491. *TT |
|---|---|
| NTB02017A | 2002-10-31. Service bulletin. ON SOME VEHICLES, THE MALFUNCTION INDICATOR LAMP IS ON WITH DIAGNOSTIC TROUBLE CODE P1491 SET. *TT |
| NTB02017 | 2002-04-02. Service bulletin. SUBJECT REGARDING MALFUNCTION INDICATOR LIGHT ON WITH DTC P1491.*YD |
3 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.