OBD Guide

C05AC

Brake Blending Separation Valve Stuck Closed

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Uneven braking
  • Increased braking distance
  • Brake system fault light comes on
  • Reduced braking performance

Causes

  • Dividing valve dirty
  • Wear of mechanical valve components
  • Wiring Harness Problems
  • Malfunction of the brake system control unit

How to Fix

  1. Check the condition of the separating valve
  2. Clean or replace valve if necessary
  3. Check the integrity of the wiring harness
  4. Test the brake system control unit
  5. Reset error and test drive

Related codes

Error C05AC by Vehicle Brand