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DTC Descriptors

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
DTC B127C 02

Microphone 2 Input Signal Circuit Short to Ground

DTC B127C 04

Microphone 2 Input Signal Circuit Open/High Resistance

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