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Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

DTC C056E set with symptom byte 42, 45, or 46

  1. Ignition ON.
  2. Verify that DTC C056E is not set.
    • If DTC C056E is set 
    1. Program the K43 Power Steering Control Module.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the Steering Gear.
      • Go to next step: If the DTC does not set
    3. All OK.
    • Go to next step: If the DTC C056E 41 is not set 
  3. All OK.

DTC C056E 4B

  1. Ignition ON.
  2. Verify that DTC C056E 4B is not set.
    • If the DTC C056E 4B is set 
    1. Calibrate the K43 Power Steering Control Module.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the Steering Gear.
      • Go to next step: If the DTC does not set
    3. All OK.
    • Go to next step: If the DTC C056E 4B is not set 
  3. All OK.

DTC C056E 5A

  1. Verify that DTC C056E 5A is not set.
    • If the DTC is set 

      Replace the K43 Power Steering Control Module.

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