Quote Originally Posted by 02NavyBlue View Post
What brand sensor did you install? I have the same code, and another (P0140, P0141). I'd use oem sensors since most sensors provide critical data for the computer to run the engine properly. A slight bit difference in aftermarket sensors can sometimes cause issues, or they may not last.
Doesn't the secondary 02 sensor only verify if the cat is working or not? I was under the impression that the first 02 sensor is the important one.