O2 Sensor issue...
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Driver School Candidate
Joined: Apr 2008
Posts: 18
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From: Texas
O2 Sensor issue...
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?
there are 2 right by the tranny tunnel if i remember correctly. right under the shifter area.
if you look under the cabin area, you can see 1 wire on each side coming from the tranny tunnel.
if you look under the cabin area, you can see 1 wire on each side coming from the tranny tunnel.
Thread Starter
Driver School Candidate
Joined: Apr 2008
Posts: 18
Likes: 0
From: Texas
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?
Thread Starter
Driver School Candidate
Joined: Apr 2008
Posts: 18
Likes: 0
From: Texas
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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Lex*Toy
SC - 1st Gen (1992-2000)
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May 4, 2006 08:48 AM
