# P0420 on the 1999 Chrysler LHS

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

- [635687](https://open.wenmarpro.com/bulletins/635687), 2002-10-30: CONCERNS WITH MALFUNCTION INDICATOR LAMP ILLUMINATION WITH A CATALYST EFFICIENCY FAILURE DIAGNOSTIC TROUBLE CODE \(DTC P0420\) RECORDED IN THE POWER TRAIN CONTROL MODULE \(PCM\). \*TT