[RiXst3r]

Originally Posted by HyperM3

Theres a lot of codes that are stored that wont throw any dash lights. The exhaust flap is one of them. The ONLY way this code is stored is if the solenoid is unplugged, not from removing the vacuum line. The reason is the electrical connection is now disconnected. With the treatment done to the vacuum line, its just seeing it as in the open position but nothing technically wrong.

Typically with aftermarket exhausts, the vacuum line is ziptied up but still doesnt affect the solenoid.

+1