Honda CR-V
U0121
The U0121 code indicates a communication issue between the engine control module (ECM) and the transmission control module (TCM) in a Honda CR-V Fifth Generation (2017-2022).
1 SolutionU-CodeNetwork
U
Error Code Type
Network
Components
1 affected
Electrical
Symptoms
6 common
- •Check engine light illuminated
- •Transmission malfunction indicator light on
- •Erratic shifting or shifting delays
- +3 more
Most Affected Generations
1 generation
5G
1
Top Affected Components
1 component
Electrical
1
Severity Levels
1 level
high
1
Quick Facts
1
Total Solutions
1
Affected Components
6
Common Symptoms
1
Generations
All Solutions
Showing 1 of 1 solution for error code U0121 across all generations.