Ram 1500
U0121
The U0121 code in a 2019-Present Ram 1500 DT indicates a communication issue between the body control module (BCM) and another control module, which may lead to various malfunctioning systems.
2 SolutionsU-CodeNetwork
U
Error Code Type
Network
Components
1 affected
Electrical
Symptoms
5 common
- •Check engine light illuminated
- •Inoperative accessories (e.g., windows, locks)
- •Erratic behavior of dashboard indicators
- +2 more
Most Affected Generations
1 generation
DT
2
Top Affected Components
1 component
Electrical
2
Severity Levels
1 level
medium
2
Quick Facts
2
Total Solutions
1
Affected Components
5
Common Symptoms
1
Generations
All Solutions
Showing 2 of 2 solutions for error code U0121 across all generations.