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Engine Exhaust Flow Valve System

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

The engine exhaust flow control valve system has two subsystems:

  1. The exhaust tail pipe flow control valve system. Also known as the exhaust sound quality valve control system.
  2. The cylinder deactivation exhaust flow control valve system. Also known as the active fuel management (AFM) exhaust flow valve control system.
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