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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 335 (Lighting System - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC B19C4 >> Conditions for Setting the DTC

Conditions for Setting the DTC

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.

DTC B19C4 11 

The LCM detects a short to ground on control circuit 122.

DTC B19C4 12 

The LCM detects a short to voltage on control circuit 122.

DTC B19C4 13 

The LCM detects an open/high resistance on control circuit 122.

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