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Home >> Buick >> 2018 >> Regal Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (Power Steering System) >> Diagnostic Information and Procedures >> DTC C056E (Power Steering Control Module) >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Byte: 43, 45, 46, 47, 4A, or 5A

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC C056E is not set.
    • If the DTC is set 
    1. Perform all necessary programming and setup procedures for the control module: K43 Power Steering Control Module
    2. Verify the DTC does not set.
      • If the DTC sets - Replace the component: K43 Power Steering Control Module
      • Go to next step: If the DTC is not set
    3. All OK.
    • Go to next step: If the DTC is not set 
  3. All OK.

Symptom Byte: 42

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC C056E is not set.
    • If the DTC is set 
    1. Calibrate the power steering control module. Refer to: Power Steering Control Module Calibration 
    2. Verify the DTC does not set.
      • If the DTC sets - Replace the component: K43 Power Steering Control Module
      • Go to next step: If the DTC is not set
    3. All OK.
    • Go to next step: If the DTC is not set 
  3. All OK.

Symptom Byte: 37

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC C056E is not set.
    • If the DTC is set 

      Replace the component: Steering Gear

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