Brake Hydraulic Circuit A Leak

Check these first

• A leaking brake line or fitting in hydraulic circuit A
• A failed seal in a caliper or wheel cylinder on circuit A
• Fluid loss at the ABS hydraulic control unit seal for circuit A
• A cracked brake hose at the circuit A wheel end
• A worn master cylinder seal feeding circuit A

What to do next

1. Check the brake fluid level and look for a low fluid warning
2. Inspect circuit A lines, hoses and fittings for wet fluid or staining
3. Pressure test hydraulic circuit A to find the leak point
4. Repair or replace the leaking line, hose or seal in circuit A
5. Bleed hydraulic circuit A and refill with the correct fluid
6. Clear the code and retest

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