P0420 on the 2001 Toyota RAV4
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.
| EG01002 | 2002-09-26. Service bulletin. SUBJECT REGARDING ENGINE CONTROL MODULE (ECM) CALIBRATION UPDATE - MALFUNCTION INDICATOR LIGHT ON WITH DIAGNOSTIC TROUBLE CODES P0420 OR P0430 AND ENHANCED ENGINE PERFORMANCE. *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.