# P0420 on the 2005 Jeep Grand Cherokee

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

- [10016583](https://open.wenmarpro.com/bulletins/10016583), 2005-09-23: MALFUNCTION INDICATOR LAMP \(MIL\) ILLUMINATION DUE TO DIAGNOSTIC TROUBLE CODES \(DTCS\) P0420 OR P0430. \*TT