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My 10ohm resistor trick didnt work for me however nothing has so far. I've tried a tune up, the antifouler, and the 10M ohm resistor trick and nothing has cleared the P0420 code for more then a week. It's driving me nuts, I even have a cat on the car but I'm guessing something isnt working right and causes me to throw the code. Joon525 suggested checking and cleaning the EGR which is what I'll do next but I'm dying to find a way to get rid of the stupid code for good without going back to the OEM cat.
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What are you looking at??
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