# P0420 on the 2003 Honda Element

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.

## Bulletins for this model year that name P0420

- [10014141](https://open.wenmarpro.com/bulletins/10014141), 2005-04-28: UPDATE ECM/PCM FOR DIAGNOSTIC TROUBLE CODE P0420, CATALYST BELOW THRESHOLD. \*NM
- [10014032](https://open.wenmarpro.com/bulletins/10014032), 2005-04-28: S/M FIX DTC P0420 TROUBLESHOOTING. \*EH
- [10003479](https://open.wenmarpro.com/bulletins/10003479), 2003-10-22: MALFUNCTION INDICATOR LAMP COMES ON WITH DIAGNOSTIC TROUBLE CODE P0420 \(CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD\). \*TT
- [10002097](https://open.wenmarpro.com/bulletins/10002097), 2003-08-14: MALFUNCTION INDICATOR LAMP ON AND DIAGNOSTIC TROUBLE CODE P0420 \(CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD\) IS SET. \*TT