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P0400 Diagnostic Trouble Code Discussion for February 2009

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1998 Mercedes-Benz ML320 3.2L MIL Lamp on VIN: 4JGAB54E4W
P0400: egr flow. vehicle originally came in with p0400 code egr flow fault. found vacuum hoses worn and colapsed to manifold and transducer. replaced hoses. one week later cust said light back on. before he came back he said the light went out. he came in to check code and cod...
February 04, 2009