# P0420 on the 2002 Toyota Highlander

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

- [10020868](https://open.wenmarpro.com/bulletins/10020868), 2007-01-24: ECM CALIBRATION UPDATE. MIL ON DTC P0420 AND/OR P0430. \*KB