# U1601 on the 2021 Ram 3500

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 U1601

- [11012036](https://open.wenmarpro.com/bulletins/11012036), 2024-12-21: Engine Control Module \(ECM\) Flash Failure, Diagnostic Trouble Code \(DTC\) U1601 – ECU Application Software Code 1 Missing Or Corrupted
- [10229492](https://open.wenmarpro.com/bulletins/10229492), 2023-01-09: Engine Control Module \(ECM\) Flash Failure, Diagnostic Trouble Code \(DTC\) U1601 ? ECU Application Software Code 1 Missing Or Corrupted
- [10224048](https://open.wenmarpro.com/bulletins/10224048), 2022-10-17: Engine Control Module \(ECM\) Flash Failure, Diagnostic Trouble Code \(DTC\) U1601 ? ECU Application Software Code 1 Missing Or Corrupted
- [10184426](https://open.wenmarpro.com/bulletins/10184426), 2020-12-21: Engine Control Module \(ECM\) Flash Failure, Diagnostic Trouble Code \(DTC\) U1601 ? ECU Application Software Code 1 Missing Or Corrupted