# P0420 on the 2024 Lexus NX

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

- [11021725](https://open.wenmarpro.com/bulletins/11021725), 2025-08-08: Some 2024 model year NX 350 vehicles equipped with a T24A\-FTS engine may exhibit a MIL ON condition with Diagnostic Trouble Code \(DTC\) P042000 \(Catalyst System Efficiency Below Threshold Bank 1\) present. The Engine Control Module \(ECM\) \(SAE term: Powertrain Control Module/PCM\) logic has been modified to reduce the possibility of this condition.