Quote:
Originally Posted by M3takesNYC
In terms of the pre-cat 02, while it is the "primary" sensor used, the post-cat O2 or secondary O2 "checks" what the primary did and if it was lean or any problems occured the secondary would light up and throw a code so I am not saying don't fix your primary sensor but its certainly not going to run lean or pose any danger with secondary intact
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No. This is not how it works at all. Where do you get this information from?