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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 208 (Parking Assistance Systems) >> Diagnostic Information and Procedures >> DTC B19BB-B19BE >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2022 Cadillac CT4. 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 B19BB 12, B19BC 12, B19BD 12, or B19BE 12 is not set.
    • If DTC B19BB 12, B19BC 12, B19BD 12, or B19BE 12 is set 
    1. Verify the appropriate B306 Parking Assist Alarm Sensors are not contaminated with snow, mud, dirt, slush, or ice.
      • If contaminated, clean the B306 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 B19BB 12, B19BC 12, B19BD 12, or B19BE 12 is not set 
  4. Verify DTC B19BB 4A, B19BC 4A, B19BD 4A or B19BE 4A is not set.
    • If DTC B19BB 4A, B19BC 4A, B19BD 4A or B19BE 4A is set 

      Replace the appropriate B306 Parking Assist Alarm Sensor with the correct sensor type.

    • Go to next step: If DTC B19BB 4A, B19BC 4A, B19BD 4A or B19BE 4A is not set 
  5. Refer to Circuit/System Testing.
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