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 B2590 01
The headlamp control module detects a short to voltage in the left cornering lamp control circuit.
DTC B2590 02
The headlamp control module detects a short to ground in the left cornering lamp control circuit.
DTC B2590 04
The headlamp control module detects an open/high resistance in the left cornering lamp control circuit.
DTC B2595 01
The headlamp control module detects a short to voltage in the right cornering lamp control circuit.
DTC B2595 02
The headlamp control module detects a short to ground in the right cornering lamp control circuit.
DTC B2595 04
The headlamp control module detects an open/high resistance in the right cornering lamp control circuit.