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What is your question?
my ml320 has code p0400 .i replace the egr valve but still this code is comin up.how can i fix this problem
2 Replies
P0400 does not mean replace the EGR valve. It means Exhaust Gas Recirculation Flow Malfunction. It could be the valves or solenoids that control the EGR valve, a leak in a hose, a clog in the EGR pipes. Further diagnosis is needed to pin point the cause.