Ram 1500
U0401
The RAM 1500 DT (2019-Present) is displaying a U0401 diagnostic trouble code, which indicates a communication issue between the Engine Control Module (ECM) and the Transmission Control Module (TCM).
2 SolutionsU-CodeNetwork
U
Error Code Type
Network
Components
1 affected
Electrical
Symptoms
5 common
- •Check engine light illuminated
- •Erratic shifting or transmission behavior
- •Engine stalling or poor performance
- +2 more
Most Affected Generations
1 generation
DT
2
Top Affected Components
1 component
Electrical
2
Severity Levels
1 level
high
2
Quick Facts
2
Total Solutions
1
Affected Components
5
Common Symptoms
1
Generations
All Solutions
Showing 2 of 2 solutions for error code U0401 across all generations.