O2 Sensor issue...
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I have an O2 sensor problem in my 92 SC300 and its causing my ck eng. light to come on and gas mileage to drop dramatically. I get code 27 and it says its the sub O2 sensor malfunctioning. Which O2 sensor is the sub O2 sensor? I have only found the 2 on the headers. Are there any others some where else along the exhaust?
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Alright, I climbed in, under, over, around and everywhere I could get to and did not see any O2 sensors in the tranny tunnel. The only 2 sensors I found were on the headers right before the first Cat. I even went so far as to grab the exhaust pipe from the 1st cat. and with my hands around the entire pipe, I slid all the way down the the 2nd cat. and didnt feel 1 single o2 sensor. So i am wondering where the heck is the sub O2 sensor located so I can remove it and get it replaced?
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Ok so if there are only the 2 O2 sensors, which one would be considered the sub O2 sensor? They both only have 1 wire coming out so I am just a little confused. Thanks for the all the info and help.
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