Audi Code P0401

Hi all. mk6 golf 1.6 tdi. which one is egr valve? top or bottom? i have Audi fault code p040100 Q7 3.0 tdi p0087 low fuel pressure

P0401 Code: Exhaust Gas Recirculation (EGR) Flow Insufficient Detected

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P0401 code issues (egr)

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