Changed O2 sensor - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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 10-18-2005, 12:19 PM   #11
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Yes I reccomend that they be replaced... But again, and I have said this many times in the past.... If your milage has not changed at all, or gotten any worse than its well enough left alone...

I have had 2 very bad O2'*, one on the 91 and the other on the 95.... Neither ever set a code... Worst milage I got was 13mpg... Normally 18-20...

To each his or her own, if you want to replace the sensor thats fine...If you don't thats fine too...

And do you mean OBD or OBDII ?

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Old 10-18-2005, 12:46 PM   #12
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Quote:
Originally Posted by joeshim
My bonnie has 155k on it... is there any way to tell if the o2 sensor is the original? The guy I got it from says it'* all highway miles & doesn't remember if it'* ever been changed.
Over the weekend I took a little trip (110 miles) all highway, and got 27mpg.
27 Mpg falls into the normal area... Replacement of the sensor may help you a bit...

Yor car was rated 18 city and 28 Hwy... It can vary with driving speed, conditions and the like... But generally these cars tend to do better than the rating on the open road... 27 is not bad...

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Old 10-18-2005, 01:10 PM   #13
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don't think there is any ryme or reason when they go. Just keep an eye on your mileage. The exhaust too will indicate a rich running car.
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