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02 sensor was a new factory replacement. I feel like I would be noticing SOMETHING else is their was a problem other then the cat going bad. I havent been able to check voltages on the 02 sensors yet but I do know what to look for, I'm an electronic tech myself and wired up code eliminators on the mustang. I think I can pretty well rule out most of the stuff on sleepy's list. The cat its self just seems like to best to start at least. Probably have to go with a piece of test pipe in place and wire in a code eliminator for now. catalytic converters are to damn expensive.
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3rd alero- 02 GX 2.2 5sp coupe. drove for 3 years 55,000 miles. Sold for a kids first car, and missed
01 Intrigue GX
2016 Chevy SS, Jet Black
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