New Techinfo Topic - O2 sensors - 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 02-06-2003, 06:39 AM   #1
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Default New Techinfo Topic - O2 sensors

A new Techinfo topic has been added to Specifications. 1987 to 1999 O2 sensor part numbers and prices. 2000-2003 data coming soon.

I need someone to tell me what year began using 2 sensors. I think it was 1996, but it might have been different for NA and SC. Let me know, and I'll add that info to the topic.
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Old 02-06-2003, 03:00 PM   #2
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That'* what I thought. Judging by the prices, I think it'* obvious when the 4-wire hit!
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Old 02-06-2003, 10:43 PM   #3
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Quote:
Originally Posted by jr's3800
Hey Will, I think the 2 O2 sensors started with the inception of the 96 model year and the OBD II diagnostic system..
OBD II started in '96? I thought it was '94. Is the 1981->1993 system (the one where you jumper the A & B terminals together for a readout) considered to be OBD I?
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Old 02-07-2003, 12:29 AM   #4
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The code flash feature was discontinued after 93. OBD II didn't start until 1996, although 1995 was kind of a freakish hybrid year.
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