my car, aside from all its other problems that u might have already read about, throws a cel 1 code - O2 sensor code when i get about 4k or above...the o2 sensor is about 2 weeks old and the wiring is hooked up properly.

 

Pull the sensor and place in a working one, could be defective. Double check the wiring. O2 code is usually just the O2. But I think it has something with the evap system aswell. If someone can back me up?