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 B388B 02
The folding top control module detects a short to ground in the auxiliary left tail/stop lamp control circuit.
DTC B388B 04
The folding top control module detects an open in the auxiliary left tail/stop lamp control circuit.
DTC B388C 02
The folding top control module detects a short to ground in the auxiliary right tail/stop lamp control circuit.
DTC B388C 04
The folding top control module detects an open in the auxiliary right tail/stop lamp control circuit.