# P0420 on the 2019 Hyundai Tucson

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

- [10182322](https://open.wenmarpro.com/bulletins/10182322), 2020-11-06: This bulletin provides information related to the repair of DTC P0420 “Catalytic Converter System Bank 1 \- Efficiency Below Threshold” found stored in the Engine Control Module \(ECM\). The repair involves performing an ECM Update and replacement of the exhaust manifold catalyst.