OBD not communicating

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View QuestionsCategory: E90 VehicleOBD not communicating
sid asked 6 days ago

hello , 
i have a bmw 3 series , 2007 model , 318i E90. i have recently replaced An ECU it was working fine but my car is on limp mode now. tried to connect with Diagnostic but there is no communication. its say no found. 
 
can you please help me with.