C0201
Brake Fluid Level Switch Circuit
The ABS or brake control module has detected a fault in the brake fluid level switch circuit. A low fluid level indicates a potential leak in the hydraulic system and disables ABS while a separate brake warning lamp is illuminated.
The ABS or brake control module has detected a fault in the brake fluid level switch circuit. A low fluid level indicates a potential leak in the hydraulic system and disables ABS while a separate brake warning lamp is illuminated.
Common causes
- high
Brake fluid level low (worn pads or hydraulic leak)
One of the most commonly reported causes for this code — check this first.
Typical part cost: $40-330
- medium
Float switch in reservoir failed
A plausible cause — test and verify before replacing parts.
Typical part cost: $40-330
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does C0201 mean?
C0201 means "Brake Fluid Level Switch Circuit". It is a generic OBD-II code that points to a fault in the chassis.
What are the most common causes of C0201?
brake fluid level low (worn pads or hydraulic leak); float switch in reservoir failed; wiring or connector fault — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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