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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 162 (Data Communications - Diagnostic Information And Procedures (2 Of 3)) >> Diagnostic Information and Procedures >> DTC U1623 >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON/Vehicle In Service Mode.
  2. Verify that DTC U1623 is not set by K124AA Image Processing Module 1 - Processor 1.
    • If the DTC is set 

      Replace the K124 Image Processing Module.

    • Go to next step: If the DTC is not set 
  3. A fault is currently not present and may be an intermittent condition.
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