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C0405 Chassis

Traction Control Active Too Long

TCS regulation has been continuously active longer than allowed, suggesting persistent low-friction conditions or a sensor fault.

Affected components

  • Abs control module
  • Wheel speed sensors

Common causes

  • Medium likelihood: Persistent low-friction surface
  • Medium likelihood: Wheel speed sensor drift

Possible symptoms

  • ABS warning light on
  • ESC/stability control deactivated
  • Possible reduced brake assist
  • Speedometer may behave erratically

Sources

Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.

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