98 bonnie how many 02 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 09-10-2005, 10:46 AM   #1
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Default 98 bonnie how many 02 sensors ?

Is there one before the convertor and after ??
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Old 09-10-2005, 11:05 AM   #2
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The only one you have to be concerned with is the one before the catalytic convertor. The one after the convertor is only used to monitor whether or not the convertor is doing its job effectively.
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