Quote:
Originally Posted by Higgs Boson
The check engine light that results from cat removal is generated by the rear O2 sensors and does nothing but tell you if the cat is there (and/or properly working). It does not do anything to adjust fuel trims, etc, those are the front O2 sensors, which are left alone. If the factory cat is indeed gone, why does the CEL light functionality (for that code) need to remain intact (unless you need additional reading light while driving)?
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Is this the only reason for the CEL to come on (the rear O2's)? I ASSume that there are other codes that will trigger it and would prefer to see those codes to take care of any issues. I also ASSume that the fuel trims are just fine, since no codes are being thrown. I am talking about my set up, which is the JBA high flow cats. Not those running off road pipes and no cats.