C0340
Active Roll Control System Malfunction
2014-2021 Mazda Mazda6 2.5L I4 🇩🇪
High SeverityChassis
Description
General fault in the active roll stabilization system that reduces body roll during cornering.
Symptoms
- Active roll control warning light
- Increased body roll in corners
- Stabilizer bar clunking noise
- Handling reduced
Common Causes
- Active stabilizer bar motor failure
- Hydraulic valve fault
- Control module malfunction
- Stabilizer bar link failure
Diagnostic Steps
- Scan for specific sub-codes
- Test active stabilizer motor or hydraulic valve
- Inspect stabilizer bar links
- Check module power supply
- Monitor system pressure if hydraulic
Repair Notes
Diagnose specific active roll control component. System may be hydraulic or electromechanical.
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
C0340 on Other Vehicles
Common Questions
What does code C0340 mean on a 2014-2021 Mazda Mazda6?
C0340 stands for "Active Roll Control System Malfunction". General fault in the active roll stabilization system that reduces body roll during cornering.
What are the symptoms of C0340 on a Mazda Mazda6?
Common symptoms of C0340 include: Active roll control warning light, Increased body roll in corners, Stabilizer bar clunking noise, Handling reduced.
What causes C0340 on a 2014-2021 Mazda Mazda6?
Common causes of C0340 include: Active stabilizer bar motor failure, Hydraulic valve fault, Control module malfunction, Stabilizer bar link failure.