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    P0420 and P0430 Codes

    Hey folks, first post. I'm having an issue, and have been having it basically for 2 years. I'm getting the p0420 and p0430 codes after replacing the cats, upstream O2 sensors, plugs, wires, and coil packs, the coolant temp sensor, battery, crankshaft position sensor, MAF sensor, evap canister...

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