Join Date: Mar 2012
Location: Cleveland, Ohio
Car Year: 2003
Car Model: Forester XS
I just finished reading the entire 28 pages of this thread and I would like to thank you all for contributing to it, I have found it quite thoroughly fascinating and informative.
My 2003 Forester XS with 100k miles is getting this code. It first came on about a month to month and a half ago. At first she ran fine, but she has since developed the following symptoms:
- Soot from the tailpipe. It even drips at times.
- Decreased gas mileage. I was getting 25/mpg and it has gradually decreased to about 22-21/mpg
- I haven't noticed any hesitation, but I have noticed it idling a bit rough, though it is slight enough that I might just be going crazy
I am thinking about starting with Sea Foam in the vacuum line and the oil and Techron Engine Cleaner in the gas, in the hopes that they clean something that is dirty, I figure even if doing that doesn't help my current situation at the very least it should clean things up a bit.
After that my next route would be replacing the upstream sensor. I did get a code for that sensor several months ago and I took it in. They just told me it was a loose connection and that was that, but perhaps it is actually going bad?
Open to suggestions and/or comments. Thanks again!