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Topless,
I agree with you on what the trouble code indicates but I replaced all of my O2 sensors when I had 210,000 on my 2001 (bad AOS damaged them). Drove the car for about 2000 miles with no alarms, then got a P0430, P0410, and P1411 in memory with no CEL (I check the system occasionally with my Durametric). I ended up replacing my gas cap (way past due/real bad shape/original) then cleared the alarms and have not seen those trouble codes since. Was the P0430 alarm just coincidental? Did the bad gas cap create the P0430 alarm? BTW I have never replaced my catalytic convers, they are original.
Talking to one of the local mechanics they have had some success running a cleaner through the induction system that helps clean catalytic converters so your suggestion of adding some Techron to the fuel might do the trick.
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Jäger
300K Mile Club
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