# P20EE on the 2020 Mack Anthem

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 P20EE

- [11030590](https://open.wenmarpro.com/bulletins/11030590), 2026-04-02: Emissions \- EC0039 MST21 Failure to Detect P20EE \- AN, CHU.
- [10168997](https://open.wenmarpro.com/bulletins/10168997), 2019-12-09: Diagnostic Trouble Code \(DTC\) P20EE \- SCR NOx Catalyst Efficiency Below Threshold \(Bank 1\) \- US17\+OBD2019 Emissions, Model Year 2020 ONLY
- [10163935](https://open.wenmarpro.com/bulletins/10163935), 2019-08-19: Diagnostic Trouble Codes \(DTC\) P20EE And P103C, Diagnostic Procedure; REPLACES GUIDED DIAGNOSTICS IN PREMIUM TECH TOOL \( PTT \) \- US17\+OBD16 And Newer Chassis ONLY
- [10160173](https://open.wenmarpro.com/bulletins/10160173), 2019-05-20: Diagnostic Trouble Codes \(DTC\) P20EE And P103C, Diagnostic Procedure; REPLACES GUIDED DIAGNOSTICS IN PREMIUM TECH TOOL \( PTT \) \- US17\+OBD16 And Newer Chassis ONLY