C0431
Lane Keeping Assist Steering Intervention Fault
2016-2021 Mazda CX-3 2.0L I4
Moderate SeverityChassisGeneric (SAE)
Description
The lane keeping assist system cannot apply corrective steering through the EPS system.
Symptoms
- LKA disabled
- Lane keep warning light
- System available in warning mode only
Common Causes
- EPS fault preventing LKA torque application
- Steering torque sensor error
- LKA module communication fault
- Steering angle sensor not calibrated
Diagnostic Steps
- Check for EPS trouble codes
- Verify steering angle sensor calibration
- Test EPS torque application capability
- Check CAN communication between LKA and EPS modules
- Inspect steering system for mechanical issues
Repair Notes
Resolve EPS faults first. LKA requires a fully functional EPS system to apply corrective steering.
Related Codes
Other Chassis Codes
- C0021LF Wheel Speed Sensor Range/Performance
- C0021LF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0025LF Wheel Speed Sensor Circuit Intermittent
C0431 on Other Vehicles
Common Questions
What does code C0431 mean on a 2016-2021 Mazda CX-3?
C0431 stands for "Lane Keeping Assist Steering Intervention Fault". The lane keeping assist system cannot apply corrective steering through the EPS system.
What are the symptoms of C0431 on a Mazda CX-3?
Common symptoms of C0431 include: LKA disabled, Lane keep warning light, System available in warning mode only.
What causes C0431 on a 2016-2021 Mazda CX-3?
Common causes of C0431 include: EPS fault preventing LKA torque application, Steering torque sensor error, LKA module communication fault, Steering angle sensor not calibrated.