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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 171 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC B197D >> Repair Instructions

Repair Instructions

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.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for module replacement, programming, and setup.

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