Renault Clio
U0121
The U0121 code indicates a communication issue between the engine control unit (ECU) and the transmission control unit (TCU) in the Renault Clio V (2019-Present), leading to potential performance issues.
2 SolutionsU-CodeNetwork
U
Error Code Type
Network
Components
1 affected
Electrical
Symptoms
5 common
- •Check engine light illuminated
- •Transmission not shifting properly
- •Engine stalling or hesitation
- +2 more
Most Affected Generations
1 generation
V
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 U0121 across all generations.