# P0420 on the 2001 Mack DMM

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

- [10130443](https://open.wenmarpro.com/bulletins/10130443), 2018-03-19: Diagnostic Trouble Code \( DTC \) P0420 Illuminating The Malfunction Indicator Lamp \(MIL\) \- US17 \(GHG17, Common Rail Fuel System\) Chassis ONLY