Q: Trying to pass emissions test. Failed once. Code P0449

Hello, thank you for writing in.代码P0449will set when the system sees that the position of the vent valve, and the voltage for its position, do not match. There could be a wiring problem, a faulty hose, or a failed component. The code only gives a general idea of the area affected, so that a certified mechanic knows where to start a diagnostic procedure. The mechanic should have the specialty tools and techniques to pinpoint what exactly is causing the issue. If you need help identifying and repairing the issue, YourMechanic.com offers several options. We have trained mechanics that can come to your home, or place of business, andperform the diagnosis and repairs for you.