ryjaytay38 Posted November 12, 2020 Share Posted November 12, 2020 Hey guys, I just got another check engine light last night. Checked it and once again, its bank 1 sensor 1 oxygen sensor. This wouldn't make me think anything, except this is the 3rd one in a year. No issues with any other o2 sensors. What could be fouling this one in particular? The gas mileage doesn't change that much. I mean, it can't get a lot worse, but I love the truck so I keep it. It's been driving great and I just wondered what I might look for that could cause only this o2 sensor to go south. Thanks in advance! Link to comment Share on other sites More sharing options...
Slartibartfast Posted November 14, 2020 Share Posted November 14, 2020 Interesting. If you clear the code, does it come back immediately? If not, it could be an intermittent connection that goes open circuit now and then and sets the code. Link to comment Share on other sites More sharing options...
RainGoat Posted November 15, 2020 Share Posted November 15, 2020 I’ve only had to replace that one once in 106K but I’ve replaced the lower ones about twice each. Easily my most common repair. Link to comment Share on other sites More sharing options...
ryjaytay38 Posted November 15, 2020 Author Share Posted November 15, 2020 No, if I clear the code, it stays gone until I shut down. As soon as I start the truck up again, there it is. I don't have any issues with any other o2 sensors. Each time it fouls, when I pull it out, it looks used but not like many I've seen. Link to comment Share on other sites More sharing options...
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