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Home >> Buick >> 2018 >> Regal GS >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC C0280 >> Circuit/System Testing

Circuit/System Testing

NOTE:

Since most occurrences of this DTC are caused by excessive ABS, traction control, or stability control usage, review with the customer the conditions under which the DTC set.

  1. Ignition ON.
  2. Verify that DTC C0186, C0196, C0287, or C0710 is not set.
    • Go to next step: If none of the DTCs are set 
  3. Ignition OFF, allow the hydraulic brake modulator valve to cool down to ambient temperature, ignition ON.
  4. Verify the DTC does not set while driving the vehicle under normal braking conditions.
    • If the DTC sets 
    1. Replace the Q5 Brake Pressure Modulator.
    2. Verify DTC C0280 does not set while driving the vehicle under normal braking conditions.
      • If the DTC does set, replace the K17 Electronic Brake Control Module.
      • Go to next step: If the DTC does not set.
    3. All OK.
    • Go to next step: If the DTC does not set 
  5. All OK.
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