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kingkoopa

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I got rid of my error code p0401 (insufficient flow) by just replacing my egr valve, temperature sensor, and vucuum modulator. I have another problem, now I have a new error code p0402 (excessive flow). I've look on youtube and the web for answer to the problem, no luck. It says to use same method as p0401, to clean valve. I skip the cleaning part by puchcasing aftermarktet parts and check light still on. What else could be wrong. My error code reader gave me only one error code which is p0402. Anyone with experience in this area, please help!!!!

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