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According to research I've done on the web, the W in WO2S11 stands for wideband, meaning it can calculate much better than a standard O2 sensor. This, I would assume, is what your car is utilizing to get its O2 reading and not the O2S11. And yes, that would be for the bank 1 sensor 1 (upstream or before cat). Your issue is not with the B1S1, though, it's ...


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I would bet the issue is the temperature sending unit (the part on the car which reports the actual temp to the computer/gauge). These sensors work off of resistance. As the temperature gets higher, more resistance is introduced and less voltage gets through. The voltage is read by the computer and then knows the temperature based on a predetermined scale. ...



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