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Message: <blockquote data-quote="stutaeng" data-source="post: 26442" data-attributes="member: 6175">I would fix the issue with the catalytic converter (since you know that's an issue and needs fixing), then see if the other issue gets resolved. I would think so. Is the system even going into closed loop right now?You have pretty much ruled out the O2 sensors being the issue since you swapped them and made no difference. But it may be a good idea to go ahead and replace all 4 sensors along with the cat. RockAuto has the best prices and we have a 5% percent discount courtesy of [USER=9438]@ORVietVet[/USER]. I've personally had good luck with Densos.If you ever get a misire and run a vehicle for a while, that will damage catalytic converters with like a 100% certainty. A lot of folks don't know that. Then they join a forum trying to "fix" the catalytic converter code. That's the effect and not the cause. Not saying this is your case, just saying in case someone doesn't know.</blockquote>