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C0099 Chassis

ABS Control Module Internal Fault

The ABS control module fails its internal self-test (RAM, ROM or processor watchdog). ABS and stability control are disabled.

Affected components

  • Abs control module

Common causes

  • High likelihood: Module internally failed
  • Medium likelihood: Power supply undervoltage during operation

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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