# P103B on the 2023 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.

This code is specific to a manufacturer and is not described here.

## Bulletins for this model year that name P103B

- [10240202](https://open.wenmarpro.com/bulletins/10240202), 2023-08-02: CBR: Mack DEF Dosing Valve Diagnostic Trouble Codes \(DTC\) P202D00, P208E00, P103B00 \- US10\+OBD13 And Newer Emissions