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Re: Cadillac, extra O2 sensor
Posted to Technical Discussion Forum on 5/21/2002 8 Replies

[...trimmed text...]

Like you said, B1S1 and B2S1 are used to fuel control for each bank. B1S2 (the one just ahead of the converter) will be used mainly for comparison with B1S3 (behind the converter).

Alan Punk Pack

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