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Well a quick check says code 1 is your O2 zensor, 12 is faulty egr , 22 is some odd valve named VTEC failure. Cleaning the EGR Will lower idle CO, the O2 might lower it across the rpm range. Having spent a couple of eternities in the LA AQMD, how are you getting smog with a CEL set? Worse case back the distributor off a degree or 2. Keep it within specs but on low side of tolerances advanced
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casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
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