# P0420 on the 1998 Nissan Altima

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

- [604788](https://open.wenmarpro.com/bulletins/604788), 1999-05-12: SERVICE MANUAL PROCEDURE CHANGE FOR REAR OXYGEN SENSOR DTC\(S\) P0137, P0138, P0139, P0140, P0141 AND THREE\-WAY CATALYST DTC P0420. \*TT