I had this code pop up on my runner at high elevation a few months back. I ended up resetting it and it never came back on. If your O2 sensor has never been replaced I would do so anyway. I changed mine for what I think was the first time at 174k and it definitely made a difference.
What's up everyone. I heard about OB from @Byron Eby last year, and finally decided to join up. I moved out to CA in 2014 and bought myself a '99 4runner back in October in the hopes of exploring as much of the West Coast as I can. The runner needed a lot of maintenance so I've been slowly...
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