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Conditions for Setting the DTC

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

DTC B0984 00 

The headlamp control module detects an internal malfunction in the left high beam solenoid actuator.

DTC B0985 00 

The headlamp control module detects an internal malfunction in the right high beam solenoid actuator.

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