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Old 01-15-2013, 05:01 PM
foaxaca foaxaca is offline
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Location: Rancho Cucamonga, CA
Join Date: May 2009
Posts: 21
Mein Auto: 1996 328is
Sounds like if any of those signals are out of spec I should be getting a CEL. Is that not the case? If not, what's a good resource for what those signals should measure out to and how to measure them? Haven't changed the post-cat O2 sensors. Would changing those out help? And this may be a noob question but I understood the cat only really helps with NOx emissions. Is that correct?
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