# P0420 on the 2023 Ford Bronco Sport

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

- [11022405](https://open.wenmarpro.com/bulletins/11022405), 2025-09-03: \* This article supersedes TSB 25\-2269 to update vehicles affected. Some of the vehicles listed in the Model statement above may exhibit an incorrectly illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble code \(DTC\) P0420 stored in the powertrain control module \(PCM\). This may be due to the software in the PCM.
- [10241542](https://open.wenmarpro.com/bulletins/10241542), 2023-09-01: Some 2020\-2022 Escape built and 2021\-2023 Bronco Sport vehicles, built on or before 28\-Sep\-2022, equipped with a 1.5L Ecoboost engine and a 8F35 transmission may exhibit an illuminated malfunction indicator lamp \(MIL\) with diagnostic trouble code \(DTC\) P0420 stored in the powertrain control module \(PCM\). This may be due to the catalytic converter. To correct this condition, follow the Service Procedure to replace the catalytic converter.