C0431moderate severityChassis
Lane Keeping Assist Steering Intervention Fault
on 2014 Hyundai Tucson 2.0L I4 · AWD
What this code means
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.
Other Chassis codes on this vehicle
C0021
LF Wheel Speed Sensor Range/Performance
C0021
LF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0023
LR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0025
LF Wheel Speed Sensor Circuit Intermittent