# P0420 on the 2011 Audi A5

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

- [10093601](https://open.wenmarpro.com/bulletins/10093601), 2017-03-03: THIS BULLETIN INFORMS THE READER TO RECEIVE DIAGNOSIS OR AUTHORIZATION FROM THE TECHNICAL ASSISTANCE CENTER BEFORE REPAIRING AN ISSUE WITH THE CATALYTIC CONVERTER THAT CAUSES DTC P042000