# U0001 on the 2020 Mack MD

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 U0001

- [10208571](https://open.wenmarpro.com/bulletins/10208571), 2022-03-03: Aftertreatment Control Module \( ACM \) Diagnostic Trouble Codes \( DTC \) U0001\-88 and U0010\-88 Lighting The Malfunction Indicator Lamp \( MIL \); Possible Derate Warning – US10 And Newer Chassis