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Home >> Chevrolet >> 2012 >> Camaro LS, Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Engine Exhaust System >> Diagnostic Information and Procedures >> DTC P166A >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify the exhaust noise changes modes from quiet to active rumble when commanding the Q15 exhaust flow control valve Open or Closed with a scan tool. The exhaust noise will be in quiet mode when the valve is closed. The exhaust noise will be in active rumble mode when the valve is open.
    • If the exhaust noise does not change 

      Refer to Circuit/System Testing.

    • If the exhaust noise changes 
  3. All OK.
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