C0431
Lane Keeping Assist Steering Intervention Fault
2014-2021 Mazda Mazda6 2.5L I4 🇩🇪
Moderate SeverityChassis
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
- C0022RF Wheel Speed Sensor Range/Performance
- C0023LR Wheel Speed Sensor Range/Performance
- C0024RR Wheel Speed Sensor Range/Performance
- C0025LF Wheel Speed Sensor Circuit Intermittent
- C0026RF Wheel Speed Sensor Circuit Intermittent
- C0027LR Wheel Speed Sensor Circuit Intermittent
- C0028RR Wheel Speed Sensor Circuit Intermittent
- C0035Left Front Wheel Speed Sensor Circuit
- C0036Left Front Wheel Speed Signal Erratic
C0431 on Other Vehicles
Common Questions
What does code C0431 mean on a 2014-2021 Mazda Mazda6?
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 Mazda6?
Common symptoms of C0431 include: LKA disabled, Lane keep warning light, System available in warning mode only.
What causes C0431 on a 2014-2021 Mazda Mazda6?
Common causes of C0431 include: EPS fault preventing LKA torque application, Steering torque sensor error, LKA module communication fault, Steering angle sensor not calibrated.