Originally Posted By: ryanschillinger
Artificialist what do you mean about the exhaust leak? That might cause it? I don't hear any exhaust leak and it passed emissions testing here in CA about a month ago. The car feels weaker now after resetting the ecu by fuses, but might be in my head, still relearning, or is how it should be now. Last tank I got 44.5mpg so I doubt there are any major problems...
it is a general rule that exhaust leaks can cause O2 sensor error codes, however, I cannot see from here if you have an exhaust leak or not.
I'm just telling you a general rule of diagnosing a car, sort of like warning people to check their PCV system when losing oil, even when I can't see the car.