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Error code P 200200 on Audi A6 - Engine control light constantly on

I have a problem with my Audi A6. The check engine light is constantly on and the error code P 200200 is displayed. This error code keeps coming back. Does anyone have any idea what the problem could be and how I can fix it?

(Translated from German)

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The error code P2002 indicates an issue with the Diesel Particulate Filter (DPF) efficiency. Start by checking if the DPF is clogged. You can try a regeneration process by driving at highway speeds for about 20-30 minutes to see if it clears the blockage. If the problem persists, it might be necessary to have the DPF professionally cleaned or replaced. Let me know how it goes or if you have any further questions!

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