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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 324 (Parking Assistance Systems) >> Diagnostic Information and Procedures >> DTC B13B0 or B13B1 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC B1A30 is not set.
    • Go to next step: If DTC B1A30 is not set 
  3. Verify DTC B13B0 12 or B13B1 12 is not set.
    • If DTC B13B0 12 or B13B1 12 is set 
    1. Verify the appropriate B166 Advanced Parking Assist Alarm Sensors are not contaminated with snow, mud, dirt, slush, or ice.
      • If contaminated, clean the B166 Advanced Parking Assist Alarm Sensors.
      • Go to next step: If there is no contamination
    2. Refer to Circuit/System Testing.
    • Go to next step: If DTC B13B0 12 or B13B1 12 is not set 
  4. Verify DTC B13B0 4A or B13B1 4A is not set.
    • If DTC B13B0 4A or B13B1 4A is set 

      Replace the appropriate B166 Advanced Parking Assist Alarm Sensor with the correct sensor type.

    • Go to next step: If DTC B13B0 4A or B13B1 4A is not set 
  5. Refer to Circuit/System Testing.
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