# P0420 on the 2001 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
- [10001998](https://open.wenmarpro.com/bulletins/10001998), 2003-07-31: ENGINE CONTROL MODULE \(ECM\) CALIBRATION UPDATE: MALFUNCTION INDICATOR LAMP ON WITH DIAGNOSTIC TROUBLE CODE P0420 OR P0430. \*TT \*JB