Diagnostic Aids
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
- Certain weather conditions during prolonged engine idling may cause ice to form in the area of the component: M106S Exhaust Control Valve Actuator - Sound Quality
- If ice is found in the area of the component M106, clean and dry the component and retest to verify the issue has been corrected.