P0420 on the 2000 Honda Civic
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.
| 05027 | 2005-11-15. Service bulletin. MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P0420 OR ENGINE PING UNDER LOAD. *TT |
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| 08252004 | 2004-09-16. Service bulletin. (COMPLETE) DISTRIBUTOR ASSEMBLY. HESITATION, PINGING AND/OR REPEAT DIAGNOSTIC TROUBLE CODE P0420 (CATALYST) PROBLEMS. REQUEST FOR PARTS. *TT |
| 011001 | 2002-02-08. Service bulletin. SUBJECT REGARDING DIAGNOSTIC TROUBLE CODE P9999 PROBABLY BEING DIAGNOSTIC TROUBLE CODE P0420. *SLC |
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.