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Home >> Cadillac >> 2024 >> LYRIQ Tech, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC C128A >> Circuit/System Verification

Circuit/System Verification

  1. Ignition/Vehicle - Off
  2. Inspect for damage - Brake System Hydraulic Brake System Diagnosis
  3. Verify there are no leaks in the component/system: Brake System - Refer to: Brake Fluid Loss
  4. A104 Brake Master Cylinder = Ambient Air Temperature.
  5. Ignition - On / Vehicle - In Service Mode
  6. Verify DTC C128A is not set
    • If DTC C128A is set 

      Replace the component: A104 Brake Master Cylinder

    • Go to next step: If the DTC is not set 
  7. All OK.
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