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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> Brakes >> Traction Control >> Antilock Brake System >> Diagnostic Information and Procedures >> DTC C122E >> Circuit/System Verification
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Circuit/System Verification

  1. Verify that all tires have the proper air pressure.
    • If not the proper air pressure 

      Adjust all tire air pressures to the stated cold air pressure as identified on the tire placard or specification.

    • If the proper air pressure 
  2. Verify that all tires are of uniform size and matching brand.
    • If not of uniform size or matching brand 
    1. Replace the miss-sized or non-matching brand tire.
    2. Ignition ON.
    3. Verify the DTC does not set while operation the vehicle under the Conditions for Running the DTC.
      • If the DTC sets, replace the K17 electronic brake control module.
      • If the DTC does not set
    4. All OK.
    • If all tires are of uniform size and matching brand 
  3. All OK.
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