C05B1
Brake Hydraulic Circuit D Leak
C05B1 is an OBD-II diagnostic trouble code meaning: Brake Hydraulic Circuit D Leak. Common causes: damage to brake lines or hoses, master cylinder malfunction. Estimated repair cost: $56–167.
Symptoms
- Reduced braking performance
- ABS or brake light comes on
- Brake fluid leak
Causes
- Damage to brake lines or hoses
- Master cylinder malfunction
- Problems with the ABS module
- Loose connections in the hydraulic circuit
How to Fix
- Check brake lines and hoses for damage
- Inspect connections for leaks
- Check the brake master cylinder and ABS module
- Replace damaged components and bleed the brake system
Related codes
Error C05B1 by Vehicle Brand
FAQ
What does the C05B1 code mean?
C05B1 is an OBD-II diagnostic trouble code that indicates: Brake Hydraulic Circuit D Leak
What causes a C05B1 error code?
The most common causes of C05B1 include: Damage to brake lines or hoses; Master cylinder malfunction; Problems with the ABS module; Loose connections in the hydraulic circuit.
How do I fix a C05B1 diagnostic trouble code?
To fix C05B1: Check brake lines and hoses for damage. Inspect connections for leaks. Check the brake master cylinder and ABS module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C05B1?
Yes, but get it checked soon
How much does it cost to fix C05B1?
The estimated repair cost for C05B1 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat