Ford Mustang
C1121
The C1121 code for the Ford Mustang S550 (2015-2023) indicates a fault with the wheel speed sensor circuit, specifically relating to the left rear wheel. This code often points to issues affecting the vehicle's antilock braking system (ABS).
1 SolutionC-CodeChassis
C
Error Code Type
Chassis
Components
1 affected
Brakes
Symptoms
5 common
- •ABS warning light illuminated on the dashboard
- •Traction control warning light activated
- •Erratic or inconsistent brake performance
- +2 more
Most Affected Generations
1 generation
S550
1
Top Affected Components
1 component
Brakes
1
Severity Levels
1 level
high
1
Quick Facts
1
Total Solutions
1
Affected Components
5
Common Symptoms
1
Generations
All Solutions
Showing 1 of 1 solution for error code C1121 across all generations.