P0420 on the 1998 Ford Explorer
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.
| 03251 | 2004-07-26. Service bulletin. DRIVEABILITY-MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED-DIAGNOSTIC TROUBLE CODES (DTC'S) P0420 AND/OR P0430. *MJ |
|---|---|
| 0475 | 2004-07-23. Service bulletin. DRIVEABILITY-MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED-DIAGNOSTIC TROUBLE CODES (DTC'S) P0420 AND/OR P0430. *MJ |
| 17312 | 2004-07-23. Service bulletin. MALFUNCTION INDICATOR LAMP (MIL) ON WITH DIAGNOSTIC TROUBLE CODES P0420 AND/OR P0430. *TT |
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.