OBD-II code · Chassis
C0128 Low Brake Fluid Indicated
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 with C0128?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWorn brake pads (fluid drops as pistons extend)
- PossibleHydraulic system leak
- Less likelyLevel switch failed
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake Fluid Level Switch, Master Cylinder Reservoir
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.