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700r4transmissionhq.com
Cadillac DTS P0411: Secondary Air Injection System → Incorrect Flow Detected | Drivetrain Resource
P0411 is a general OBDII trouble code, which means that it has the same meaning for the Cadillac DTS as it would any other car or truck. By definition, the code is letting you know that the ECM has detected incorrect flow in the secondary air injection system. P0411: Secondary Air Injection System → Incorrect
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