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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-02-2010, 05:53 PM   #1
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Default Check Engine Light

My 96 SE had a check engine light today. I got out my trusty code reader you guys have recommended and it came up with a 0135 and a 0135P. My little book with the scanner says 0135 is an O2 sensor on the rt bank but it has no code for 0135P. Should I change this out or just erase the code and see if it happens again? I have noticed my gas mileage has dropped several mpg recently but I was just blaming the winter gas for that. Are the o2 sensors hard to change? Thanks
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Old 01-02-2010, 05:56 PM   #2
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Both the same code. clear the code and see if it comes back. How many miles you have on that O2 sensor?
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Old 01-02-2010, 06:02 PM   #3
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No clue on the sensor. My bro in law was lax on maintenance so might be original. Car is at 121K. I just finished reading your instructions on replacing the O2 sensor in the "how to" section. Very handy! I should have read that first before posting. I will look into finding a Denso replacement. Thanks!
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Old 01-02-2010, 06:05 PM   #4
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Give that a try. Might fix the problem. The O2 sensor is very rarely changed unless it goes out totally.
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Old 01-02-2010, 06:23 PM   #5
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O2 sensors are really not that hard IF you get the special socket at a parts store.
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Old 01-02-2010, 06:35 PM   #6
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Is the O2 sensor on my 96 located on the exhaust manifold? ( It'* -20 windchill out there right now or I would just go check : ^ )
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Old 01-02-2010, 06:40 PM   #7
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Should be right on top of the rear manifold.
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Old 01-02-2010, 07:08 PM   #8
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Just checking, I looked at some online parts houses and they listed upstream and downstream O2 sensors for the 96 se so I figured I better ask. Thanks guys!
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Old 01-02-2010, 07:19 PM   #9
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Duh, thanks Dan, I forgot about him asking how hard it was. Preoccupied with finding image for socket.
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Old 01-02-2010, 07:58 PM   #10
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Quote:
Originally Posted by novapwr View Post
Just checking, I looked at some online parts houses and they listed upstream and downstream O2 sensors for the 96 se so I figured I better ask. Thanks guys!
Upstream is before the cat and downstream is after the cat.
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