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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC P0856 >> Circuit/System Verification
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit/System Verification

  1. Verify there are no other DTCs set, except for DTC P0856.
    • Go to next step: If no other DTCs are set 
  2. Replace the component: K20 Engine Control Module
  3. Under normal operating conditions: Verify that no DTCs are set.
    • If the DTC sets 

      Replace the appropriate component: K160 Brake System Control Module or K17 Electronic Brake Control Module

    • Go to next step: If no DTC is set 
  4. All OK.
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