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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Driver Monitoring System) >> Diagnostic Information and Procedures >> DTC B1599 >> Diagnostic Aids

Diagnostic Aids

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.

Poor or incomplete connections are the most common cause of this DTC. Verify all of the USB connections, including in-lines, are seated properly.

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