Code result

C0128

Low Brake Fluid Circuit

Moderate severity

What it means

The brake fluid level switch in the master cylinder reservoir reports a low level. ABS and stability control may be deactivated as a precaution.

Is it safe to drive?

Use caution

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.

Most likely causes

  • Worn brake pads (fluid drops as pistons extend)

    high

    One of the most commonly reported causes for this code — check this first.

  • Hydraulic system leak

    medium

    A plausible cause — test and verify before replacing parts.

  • Level switch failed

    low

    Less common, but worth ruling out after the more likely causes.

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