# P0420 on the 2005 Dodge Ram

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

- [10015801](https://open.wenmarpro.com/bulletins/10015801), 2005-08-12: MALFUNCTION INDICATOR LAMP LIGHT WITH DIAGNOSTIC TROUBLE CODE P0430 OR P0420 \- CATALYST EFFICIENCY. \*TT UPDATE. \*TT