Toyota Corolla
U0121
The U0121 code indicates a loss of communication with the Anti-lock Brake System (ABS) control module in a 2019-2024 Toyota Corolla E210. This can lead to issues with vehicle stability and braking performance.
4 SolutionsU-CodeNetwork
U
Error Code Type
Network
Components
2 affected
BrakesElectrical
Symptoms
10 common
- •ABS warning light illuminated on the dashboard
- •Traction control light illuminated
- •Loss of ABS functionality
- +7 more
Most Affected Generations
2 generations
E210
3
E140
1
Top Affected Components
2 components
Electrical
3
Brakes
1
Severity Levels
1 level
high
4
Quick Facts
4
Total Solutions
2
Affected Components
10
Common Symptoms
2
Generations
All Solutions
Showing 4 of 4 solutions for error code U0121 across all generations.