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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Exhaust System) >> Diagnostic Information and Procedures >> DTC P26C5-P26C7 or P31CF-P31E8 (L3B) >> Repair Instructions

Repair Instructions

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.

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

Additional Procedures 

Exhaust Control Valve Learn  - Perform only when the following component/system is replaced or serviced: M106S Exhaust Control Valve Actuator - Sound Quality - Removed/Replaced