Do yourself a favor and remove the tube from the back of the egr valve and disconnect it at the intake , clean the carbon out of it. Clear your code and dont waste any money on a new purge valve. ( incorrect flow) Done this on alot of 104 ,111,120 motors.

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euro 287
Mercedes Technician 7 Years (retired to Hyundai)
2000 Dodge Durango
98 Mazda truck