# P0420 on the 2018 Mack Terrapro

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

- [10209939](https://open.wenmarpro.com/bulletins/10209939), 2022-04-05: Mack Chassis \- Diagnostic Trouble Code \( DTC \) P0420 Illuminating The Malfunction Indicator Lamp \(MIL\) \- US17\+OBD16 And US17\+OBD18 \(GHG17\) Emissions \(Common Rail Fuel System\) \- Commonly Model Years 2018 And 2019
- [10204011](https://open.wenmarpro.com/bulletins/10204011), 2021-12-07: Mack Chassis \- Diagnostic Trouble Code \( DTC \) P0420 Illuminating The Malfunction Indicator Lamp \(MIL\) \- US17\+OBD16 And US17\+OBD18 \(GHG17\) Emissions \(Common Rail Fuel System\) \- Commonly Model Years 2018 And 2019
- [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