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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC B258A: Low Beam >> Conditions for Setting the DTC

Conditions for Setting the DTC

DTC B258A 01 

The BCM detects a short to voltage in the headlamp low beam relay control circuit.

DTC B258A 02 

The BCM detects a short to ground in the headlamp low beam relay control circuit.

DTC B258A 04 

The BCM detects an open in the headlamp low beam relay control circuit.

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